| SOD | Year | Day of Year |
Time of Day |
Data Impact | System | Description |
|---|---|---|---|---|---|---|
| 71050725 | 2024 | 109 | 14:00 | 2 | 6.01.01 | Replaced the receive cable, the system delay changed from 87.57ns to 88.06ns. |
| 71050725 | 2024 | 063 | 15:50 | 2 | 6.01.01 | Tom checked the quad integrator, Channel A=receive alignment, now looks good. He adjusted (OZ) using a voltmeter from 4.4mv to 0.6mv hoping to improve the Rec Pwr (vns) reading on the controller display and to prevent crossover readings. |
| 71050725 | 2024 | 055 | 15:30 | 2 | 6.01.01 | The integrator channel 0ne OZ pot was adjusted with no receive signal. The controller screen "Rec Pwr" changed from 4.998 to 0.002. This was requested to eliminate crossover reading |
| 71050725 | 2024 | 028 | 14:02 | 2 | 6.01.01 | Replaced MCP PMT with the original S/N B3150130, the internal gating module was replaced. The spare MCP-PMT S/N B2190920 was removed. The system delay changed from 86.88ns to 87.53ns |
| 71050725 | 2024 | 005 | 15:29 | 2 | 6.01.01 | Replaced MCP PMT with the spare, do to no returns. The system delay changed from 87.53ns to 86.88ns |
| 71050725 | 2023 | 275 | 12:00 | 1 | 6.01.01 | The FS740 GPS Serial Number 001243 was replaced with FS740 GPS Serial Number 001918 do to failure. |
| 71050725 | 2023 | 116 | 09:00 | 1 | 6.01.01 | On 4/26/23 (116) the NIMBIN power supply and chassis were changed in the MOBLAS-7 system. This was done to corrected the discriminator test problems, oscillations with the return signal and lack of stability with the system delay. |
| 71050725 | 2023 | 063 | 11:30 | 1 | 6.01.01 | The ARSU (G77389) was replaced with ARSU (G77948) on 03/04/2023 at 11:30am. The system changed from 85.63ns to 87.53ns |
| 71050725 | 2023 | 062 | 03:28 | 1 | 6.01.01 | Installed the spare integrator G77285 and the old integrator G77939 was removed on 03/03/23 0328z |
| 71050725 | 2022 | 338 | 10:30 | 1 | 6.01.01 | The ARSU (001204) was replaced with ARSU (G77389) on 12/04/2022 at 10:30am. The system changed from 86.93ns to 85.63ns |
| 71050725 | 2022 | 239 | 06:50 | 1 | 6.01.01 | The ARSU (G77944) was replaced with ARSU (001204) on 08/27/2022 at 10:00am. The system changed from 85.92ns to 86.94ns |
| 71050725 | 2022 | 236 | 06:34 | 1 | 6.01.01 | The system was optimize, laser setting with the replacement of the power units PU610 and PU620 and ran into a few issues: The delay adjustments are now made on the individual capacitor banks. The CB631 was adjusted to 300usec (as before), and the CB632 delay was adjusted obtain maximum amplifier IR power. The delay for the CB632 is 190 usec. Adjusted oscillator PU610 voltage 50 volts above oscillator lasing threshold. The new voltage is 1.24kv. I noticed the oscillator pulse train was unstable. Adjusted rear cavity mirror, AML brag angle and cavity length for optimal pulse width and stability. The PU620 amplifier voltage was adjusted to 1.42kv (seems high) to obtain a 2.0 watts reading at 10PPS. Measured the green power at 0.74 watts (LOW!). Verified no self lasing, Pockel Cell fine adjustment and 1/4 waveplate adjustments were optimal. In stalled a replacement SHG to obtain 1.0 watts at 10pps. (50 % conversion) This is still a little low but is acceptable. Installing the replacement SHG shifted the angle of the beam at the output. Adjusted the final (21b) mirror to center the beam at the laser output. You will need to perform a laser bore site alignment. Ranged to the calibration target and took a data set. RMS was improved to 2.5 mm. |
| 71050725 | 2022 | 183 | 10:00 | 1 | 6.01.01 | The ARSU (001204) was replaced with ARSU (G77399) on 07/02/2022 at 10:00am. The system changed from 86.99ns to 85.94ns |
| 71050725 | 2022 | 141 | 11:30 | 1 | 6.01.01 | The ARSU (G77399) was replaced with ARSU (001204) on 05/21/2022 at 07:30am. The first tracking data received was on 05/23/2022 at 0443z, the system changed from 85.67ns to 86.98ns. The ARSU system delay changed from 150.80ns to 153.00ns |
| 71050725 | 2022 | 117 | 02:50 | 1 | 6.01.01 | The ARSU (001204) was replaced with ARSU (G77399) on 04/23/2022 at 07:00am. The first tracking data received was on 04/27/2022 at 0250z, the system changed from 86.93ns to 85.67ns |
| 71050725 | 2022 | 020 | 14:00 | 1 | 6.01.01 | Replaced the LRC board back to Moblas 7 original board, the one that was in the system was the network spare under test. |
| 71050725 | 2021 | 356 | 14:00 | 1 | 6.01.01 | The Moblas 7 ETM #001196 was replaced with the network spare ETM #001108 for testing. The system delay changed from 96.99 to 96.93 |
| 71050725 | 2021 | 320 | 13:00 | 0 | 99 | The CRDv2 generation software was added to MOBLAS-7 for testing, in parallel with the operational CRD processes. The software was installed on Tuesday, 11/16/2021. There should be no change to operational processes at the station. The test data will be automatically sent from the station to the SLR-DOC, and will be examined by the DOC team for a month or so before moving into a prime mode. |
| 71050725 | 2021 | 267 | 12:06 | 2 | 6.01.01 | Corner Cube target "C" LTN 92-E was dropped in the grass and we could not locate it. The corner cube "B" LTN 92-F was installed on target "C" from 267 to 270. Corner cube LTN 94-1 was placed on target "C" on 270 and LTN 92-F was put back on target "B". |
| 71050725 | 2021 | 223 | 04:55 | 0 | 12.01.02 | the pressure comparisons. ("Met data additional information" - "Logging data from 2ndary Met unit 3x per day") |
| 71050725 | 2020 | 288 | 11:11 | 0 | 99 | The Dell new processor computer was installed into the system with CentOS 7 |
| 71050725 | 2020 | 231 | 19:20 | 2 | 6.01.01 | It was determined that all cals and satellite voltage will be -2900 volts during the daylight hours.. |
| 71050725 | 2020 | 227 | 03:14 | 2 | 6.01.01 | There was a meeting on 08/13/20 (226) to discuss Moblas 7 date accuracy, it was determined that all cals and satellite voltage will be -3100 volts. The system delay remained the same 87.06ns but the RMS is higher on the cals and some satellites. Before the voltage change cals 1.6mm after the voltage change now 4.1mm |
| 71050725 | 2020 | 195 | 00:30 | 2 | 6.01.01 | Replaced MCP PMT with the spare, do to weak returns. The system delay changed from 86.36ns to 87.04ns |
| 71050725 | 2020 | 193 | 09:30 | 2 | 6.01.01 | Replaced the high voltage cable, the old one had a bad connector. No change in the system delay. |
| 71050725 | 2020 | 192 | 04:01 | 2 | 6.01.01 | Replaced MCP PMT with the spare, do to weak returns. The system delay changed from 86.36ns to 87.04ns |
| 71050725 | 2020 | 156 | 08:33 | 2 | 12.01.02 | Replaced the MET 4 - Did not output humidity reading correctly |
| 71050725 | 2020 | 146 | 02:22 | 0 | 6.01.01 | The integrator cable W515 was replaced, from the Delay Box integrator output to the integrator input |
| 71050725 | 2020 | 067 | 12:29 | 2 | 6.01.01 | Changed the transmit cable with a low loss cable. The system changed from 83.38ns to 86.38ns. |
| 71050725 | 2020 | 053 | 12:00 | 2 | 6.01.01 | Test a PMT cable, signal reflections in the range window and to reduce high RMS. |
| 71050725 | 2020 | 049 | 13:13 | 0 | 9.01.01 | Replaced the GPS signal splitter with a better splitter for the GPS Antenna. |
| 71050725 | 2020 | 043 | 11:25 | 2 | 99 | Replaced the ARSU for testing. This is what changed the system delay by 1.25ns, from 82.05ns to 83.30ns. |
| 71050725 | 2020 | 017 | 04:32 | 0 | 6.01.01 | Changed HEO Etalons 0525 and 4146 also Glonass 9128-9139 from 4pps to 5pps |
| 71050725 | 2019 | 243 | 03:45 | 1 | 9.02.03 | ETN 2865 -Replacement of Xli with Stanford Research FS740 GPS steered Rubidium. |
| 71050725 | 2019 | 208 | 12:00 | 2 | 6.01.01 | Replaced PMT cable during troubleshooting to reduce high RMS. Awaiting analysis for a week or more. |
| 71050725 | 2019 | 112 | 15:00 | 0 | 09:01:01 | Removed G77979 CNS Clock and installed M04600 CNS Clock in the MOBLAS 7 Timing Rack. |
| 71050725 | 2019 | 095 | 13:00 | 1 | 9.02.03 | Removed XL-DC SCNS03102 and installed XLi SCNS000150 for testing. |
| 71050725 | 2019 | 079 | 14:00 | 1 | 9.02.03 | A second 1PPS output was connected to the LRC 1PPS. The prime 1PPS was connected to the ETM. |
| 71050725 | 2019 | 077 | 18:00 | 2 | 12.01.02 | MET 4 not updating - rebooted the controller all came back up operational. |
| 71050725 | 2019 | 074 | 14:00 | 0 | 12.01.02 | Swapped MET 4 SCNS001144 with SCNS000992. |
| 71050725 | 2019 | 055 | 00:00 | 0 | 4.01 | Replaced azimuth slip ring and three elevations slip rings due to mount cable failures. |
| 71050725 | 2019 | 030 | 00:00 | 0 | 04.01 | Elevation Tachometer had intermittent problems and was unable to perform calibrations. |
| 71050725 | 2019 | 023 | 00:00 | 2 | 6.01.01 | Reinstalled Assemblies Inc receive cable since the MegaPhase receive cable failed. |
| 71050725 | 2018 | 324 | 00:00 | 2 | 9 | A ND was added to the PD-10 start diode to reduce the signal on 11/20/18 (324) to try to eliminate the change from pre and post-cal system delay change, no help. |
| 71050725 | 2018 | 282 | 04:50 | 2 | 06.01.03 | Moblas 7 MCP was reinstalled max rating -3400 |
| 71050725 | 2018 | 265 | 12:45 | 2 | 06.01.03 | A new MCP was installed max rating -3200 |
| 71050725 | 2018 | 250 | 16:30 | 2 | 99 | modified LRC board installed for 10pps tracking of HEO |
| 71050725 | 2018 | 240 | 00:00 | 0 | 99 | Processor computer was upgraded with CentOS 6 vice RedHat operating system. |
| 71050725 | 2018 | 198 | 17:30 | 2 | 6.01.01 | Removed original Assemblies Inc. receive cable and replaced with Megapath receive cable. |
| 71050725 | 2018 | 198 | 03:24 | 2 | 6 | Installed new vendor (Megaphase) receive cable. Configuration flags changed, controller from 6 to 7 ad on the processor from 7 to 8. |
| 71050725 | 2018 | 177 | 00:00 | 2 | 6.01.03 | Found IRIG-B cable on ETM when it should have been connected to the ETC and XL-DC year was 8018 versus 2018 (reset to 2018). |
| 71050725 | 2018 | 176 | 00:00 | 2 | 6.01.03 | Bad ETM data reported - Tom V requested shut down of system. |
| 71050725 | 2018 | 171 | 00:00 | 2 | 9 | Replaced PD-10 with repaired unit - adjusted laser due to low power. |
| 71050725 | 2018 | 169 | 00:00 | 2 | 9 | Replaced failed PD-10 power supply for photo diode. |
| 71050725 | 2018 | 164 | 00:00 | 2 | 9 | PD-10 power supply for photo diode failed. |
| 71050725 | 2018 | 108 | 00:00 | 1 | 6 | System delay changed from 82.50ns to 82.55ns due to IRIS being partially closed. |
| 71050725 | 2018 | 081 | 00:00 | 2 | 9 | Replaced intermittent PD-10 power supply cable. |
| 71050725 | 2018 | 078 | 00:00 | 2 | 9 | Problems with intermittent PD-10 power supply cable - to be replaced at a later date. |
| 71050725 | 2018 | 067 | 00:00 | 0 | 6.01.03 | Tom O removed power dividers for the Event Timer receive NIM pulse to see if it would improve the ETM RMS - it did not. Tom V thinks it is a laser pulse-width problem. |
| 71050725 | 2018 | 063 | 00:00 | 2 | 6.01.03 | Tom O installed power dividers for the Event Timer receive NIM pulse onto a blank panel w/ground strap. Reconnected the fake stop and the HSLR NIM signal cables (extended by one nanosecond). Ground calibration RMS results for the TIU=3.6mm and the ETM=2.0mm. |
| 71050725 | 2018 | 049 | 00:00 | 2 | 99 | Removed the Moblas 8 ARSU that was being tested - installed the Moblas 7 ARSU. |
| 71050725 | 2018 | 044 | 00:00 | 2 | 99 | Installed an ARSU (for MOBLAS 8) for testing. |
| 71050725 | 2018 | 043 | 00:00 | 2 | 9 | ND`s were added to reduce the amplitude from .6 vns to .4 vns on the controller monitor. This improved the ETM RMS from 2.3mm to about 1.7mm. |
| 71050725 | 2018 | 027 | 00:00 | 2 | 6 | Gating cable stopped working - replaced on day 028. |
| 71050725 | 2018 | 027 | 00:00 | 2 | 9 | Installed new start diode mount and optimized for 10pps ranging. |
| 71050725 | 2018 | 011 | 00:00 | 2 | 6 | Intermittent gating cable, losing signal every so often. |
| 71050725 | 2017 | 301 | 00:00 | 2 | 6 | Replaced the received cable with a new one that is insulated, a stability test was performed. The system delay changed from 82.21ns to 82.62ns. |
| 71050725 | 2017 | 299 | 00:00 | 2 | 99 | Replaced the ARSU cable with a new cable. |
| 71050725 | 2017 | 250 | 00:00 | 1 | 9:01:01 | Remove the XL-DC under test and to reinstall MOBLAS 7 XLDC. |
| 71050725 | 2017 | 240 | 13:00 | 1 | 9:01:01 | Installed the M6 XL-DC for evaluation. |
| 71050725 | 2017 | 216 | 00:00 | 0 | 99 | Replaced the Processor computer with the one from the Lab. |
| 71050725 | 2017 | 193 | 00:00 | 0 | 6 | Reinstalled the MOBLAS 7 event timer 2394491/001196, the event timer 2394493/001108 was removed. |
| 71050725 | 2017 | 163 | 00:00 | 2 | 9 | NDs was added to the start diode to reduce the reading from 1.0vns to 0.5vns on the controller monitor to make the reading and laser power output comparable (100mjoules out = .5 vns. 06/12/17). |
| 71050725 | 2017 | 140 | 00:00 | 2 | 6 | Replaced the receive cable, the system delay changed from 84.66ns to 83.08ns. |
| 71050725 | 2017 | 109 | 14:00 | 2 | 6.01.03 | Event timer change from Cybi-ETM-02 s/n 1309-B-010 to s/n B-009 |
| 71050725 | 2017 | 109 | 14:00 | 0 | 6.01.03 | Event timer change from Cybi-ETM-02 s/n 1309-B-010 to s/n B-009. |
| 71050725 | 2017 | 099 | 00:00 | 0 | 99 | Processor computer (DPC) was changed. |
| 71050725 | 2017 | 087 | 00:00 | 1 | 12.01.02 | MET4 was not inputting the data to the Controller (ICC), the power cable was disconnected in the rack, connected the cable and tie wraps were added to prevent this from reoccurring in the future. |
| 71050725 | 2017 | 064 | 00:00 | 0 | 4 | Completed the installation of the GLM Telescope, also balanced the MOBLAS 7 telescope. |
| 71050725 | 2017 | 059 | 00:00 | 2 | 99 | Changed the transmit delay from 2 to 1 on the LRC board. |
| 71050725 | 2017 | 029 | 00:00 | 2 | 99 | Installed repaired ARSU - caused system delays. |
| 71050725 | 2016 | 252 | 00:00 | 1 | 6 | Receive cable replaced. |
| 71050725 | 2016 | 241 | 00:00 | 1 | 99 | Spare LRC board installed into MOBLAS 7 |
| 71050725 | 2016 | 208 | 17:00 | 2 | 6 | Event Timer went prime for operational support. |
| 71050725 | 2016 | 149 | 00:00 | 2 | 12.01.02 | Adjusted MET4 height so that the baraometer port is now level to the center of the elevation axis |
| 71050725 | 2015 | 322 | 20:15 | 0 | 99 | Engineering removed MOBLAS7 TXA card, ACD card, AZ encoder module and reference module and transferred them to MOBLAS-6 leaving MOBLAS-7 with severe AZ and EL glitching problems. |
| 71050725 | 2015 | 321 | 13:32 | 1 | 6.01.02 | Changed the HP5370B TIC from unit G78770 to unit G78769, the configuration flags was changed on the processor from 5 to 6. |
| 71050725 | 2015 | 320 | 23:32 | 0 | 99 | Changed correlation on AZ encoder from 4 to 3 and changed EL encoder from 4 to 2. Changed the AZ offset from +0.569 to -0.131. |
| 71050725 | 2015 | 295 | 03:15 | 2 | 99 | A new ephemeris file update for the star cal program was tested, the old ephemeris file will expire at the end of 2015. |
| 71050725 | 2015 | 266 | 15:15 | 0 | 99 | The Event Timer is now taking data at the same time as the 5370B counter and both set of data collection are processed at the same time. |
| 71050725 | 2015 | 252 | 12:35 | 2 | 99 | The 5370B counter that was under test was removed and shipped to Moblas 6, Moblas 7 5370B counter was reinstalled. |
| 71050725 | 2015 | 247 | 10:50 | 2 | 99 | The LRC board was exchanged with Moblas 7 LRC board for testing. |
| 71050725 | 2015 | 215 | 11:15 | 0 | 99 | Three cables for new servo system was added a 10Mhz and IRIG B from MOBLAS 7 XLDC and a 1pps from the LRC chassis, config flags were incremented (216 09:30) controller from 3 to 4 and processor from 4 to 5. |
| 71050725 | 2015 | 215 | 10:40 | 2 | 99 | Removed HP5370B counter G78681 and installed G78762 and the boards in the LRC chassis was changed to clear a transpwr reading on the controller monitor. Incremented the configuration flags (on day 216 03:25) on the controller from 3 to 4 and the processor from 4 to 5. |
| 71050725 | 2015 | 206 | 11:15 | 2 | 9:01:01 | Timing EC-1073 (changing 1PPS source) was installed into the system. The configuration flags were incremented (on day 208 00:20) from 2 to 3 on the controller and 3 to 4 on the processor. |
| 71050725 | 2015 | 203 | 08:15 | 0 | 99 | System back up, the high voltage cable connector was replaced to clear the problem with the high voltage power supply voltage and current fluctuations. |
| 71050725 | 2015 | 202 | 18:35 | 0 | 99 | System down due to High voltage power supply voltage and current fluctuation. |
| 71050725 | 2015 | 200 | 00:25 | 0 | 99 | Original LRC reinstalled back into the system: incremented the configuration flags on the controller from 1 to 2 and the processor from 2 to 3 for MOBLAS 7. |
| 71050725 | 2015 | 194 | 22:00 | 2 | 9:01:01 | Added a cable delay to the XLDC +7230nsec to bring the GPS-RUB to -7.061us and the STA-RUB to 7.078us. |
| 71050725 | 2015 | 194 | 21:12 | 2 | 99 | Installed HP5370B counter G78681: configuration flags were incremented on the controller from 0 to 1 and the processor from 1 to 0 for the test of. |
| 71050725 | 2015 | 181 | 11:11 | 0 | 99 | Network spare LRC chassis installed into the system for testing: incremented the configuration flags (day 182 02:47) on the processor computer from 0 to 1 and controller from 9 to 0 for the spare LRC installation. |
| 71050725 | 2015 | 172 | 23:58 | 2 | 6.01.01 | Replaced the MCP due to weak returns; incremented the configuration flag (day 173 02:31) on the processor from 9 to 0 for the replacement of the MCP and receive cable. |
| 71050725 | 2015 | 170 | 09:30 | 0 | 99 | High voltage power supply voltage and current is fluctuating, replaced bad high voltage cable connector. |
| 71050725 | 2015 | 156 | 11:12 | 2 | 9:01:01 | Engineering working on timing rack, replaced CNS, G77945 to G77979; incremented the configuration (at 20:19) on the processor computer from 8 to 9 for the replacement of the CNS unit. |
| 71050725 | 2015 | 153 | 10:55 | 0 | 99 | Replaced Ethernet switch under floor with new gigabit Ethernet switch model G5108 NTGEAR, downlink 94.79mbbps, uplink 97.72mbps. |
| 71050725 | 2015 | 137 | 09:15 | 0 | 99 | Using timing to verify the spare LRC chassis, had to reset timing TCG and CNS to XLDC reading changed by 30nsec. |
| 71050725 | 2015 | 118 | 15:45 | 2 | 99 | Removed MET4 000829 and installed MET4 2378313. |
| 71050725 | 2015 | 049 | 20:15 | 2 | 6.01.01 | Replaced the MCP gate cable, the one in the system failed. |
| 71050725 | 2014 | 300 | 02:53 | 2 | 6.01.01 | Replaced the MCP; the one in the system failed; config flag on process incremented from 6 to 7. |
| 71050725 | 2014 | 254 | 02:11 | 2 | 99 | Removed M04297 counter from M7 after testing and reinstalled M7 counter G78769; config flag on process incremented from 5 to 6. |
| 71050725 | 2014 | 224 | 21:17 | 0 | 99 | Timing jumped, Sta-Rub was 7.160us now 7.192us; GPS-Rub was -7.202us now -7.103us; reason unknown. |
| 71050725 | 2014 | 210 | 18:00 | 2 | 99 | Installed M04297 counter into M7 for testing; config flag on process incremented from 4 to 5. |
| 71050725 | 2014 | 209 | 13:00 | 2 | 99 | Removed G71282 counter and reinstalled M7 counter; config flag on process incremented from 3 to 4. |
| 71050725 | 2014 | 202 | 13:00 | 2 | 99 | LRC chassis false stop adjusted from one microseconds to two microseconds. |
| 71050725 | 2014 | 200 | 13:00 | 2 | 9 | IRIG B sync out of TCG problems. |
| 71050725 | 2014 | 189 | 13:00 | 0 | 5 | Laser adjusted and bore-sighted on the ground target. |
| 71050725 | 2014 | 184 | 13:00 | 2 | 99 | Installed G71282 counter; config flags reset from 2 to 3 on processor computers. |
| 71050725 | 2014 | 182 | 13:00 | 0 | 99 | Replaced two bad cables for door interlock. |
| 71050725 | 2014 | 167 | 13:00 | 2 | 11 | Changed out transceiver on Radar to eliminate tuning errors. |
| 71050725 | 2014 | 166 | 02:45 | 2 | 99 | Installed repaired G78769; config flags reset 1 to 2. |
| 71050725 | 2014 | 166 | 01:34 | 2 | 99 | Installed SCNS0003190; removed G78769; config flags reset 0 to 1. |
| 71050725 | 2014 | 163 | 13:00 | 2 | 99 | Installed G77341; removed G77986 bad power supply. |
| 71050725 | 2014 | 161 | 13:00 | 2 | 99 | Installed G71282; returned G78769; config flags reset 9 to 0. |
| 71050725 | 2014 | 160 | 13:00 | 2 | 99 | Removed G77986; installed G77341. |
| 71050725 | 2014 | 152 | 13:00 | 0 | 99 | Installed repaired OAM daylight filter switch. |
| 71050725 | 2014 | 150 | 13:00 | 2 | 99 | Repaired spare LRC and ARSU Chassis. |
| 71050725 | 2014 | 147 | 13:00 | 0 | 99 | Laser Interlock Door Failure; installed spare cards. |
| 71050725 | 2014 | 139 | 16:00 | 2 | 6.01.01 | Installed spare MCP into M7 system due to gating issues; config flags reset from 7 to 8. |
| 71050725 | 2014 | 137 | 16:00 | 2 | 6.01.01 | Replaced PMT; using original cable. |
| 71050725 | 2014 | 135 | 13:00 | 2 | 6 | Replaced OAM and Gating cables. |
| 71050725 | 2014 | 125 | 13:00 | 2 | 99 | Spare counter M04263 installed for Network Testing and config flag set to 7 from 6 (G78769 removed). |
| 71050725 | 2014 | 122 | 10:00 | 2 | 6 | Receive cable bad; replaced. |
| 71050725 | 2014 | 081 | 00:00 | 1 | 9.01.01 | XL-DC replaced and removed XL-DC battery backup. |
| 71050725 | 2014 | 065 | 22:00 | 2 | 6.01.01 | installed new Photek MCP. |
| 71050725 | 2013 | 305 | 00:00 | 1 | 9.01.01 | Replaced A10 in the TCG. |
| 71050725 | 2013 | 143 | 17:00 | 1 | 9.01.01 | XLDC 000271 Removed 000149 Installed. |
| 71050725 | 2013 | 115 | 04:06 | 2 | 99 | Installed 5370B counter G78769 |
| 71050725 | 2013 | 071 | 12:58 | 2 | 6 | Receive Cable changed |
| 71050725 | 2013 | 022 | 08:05 | 2 | 99 | Installed 5370B counter G78768 |
| 71050725 | 2012 | 354 | 00:00 | 1 | 9.01.01 | New Truetime installed (G77318). |
| 71050725 | 2012 | 348 | 22:10 | 1 | 9.01.01 | Replaced Truetime XL-DC Freq. Standard. |
| 71050725 | 2012 | 347 | 10:10 | 2 | 09.01 | XL - DC G000271 was installed |
| 71050725 | 2012 | 296 | 00:00 | 1 | 9 | A10 card replaced in TCG to fix strobe fault. |
| 71050725 | 2012 | 263 | 02:10 | 2 | 6.01.01 | Installed MCP daylight filter assy. |
| 71050725 | 2012 | 263 | 02:05 | 2 | 9 | Installed new TCG G77986. |
| 71050725 | 2012 | 261 | 17:00 | 1 | 12.02.01 | MET4 117635 Removed MET4 115135 Installed. |
| 71050725 | 2012 | 101 | 05:28 | 2 | 99 | Counter return to orginal configuration |
| 71050725 | 2012 | 096 | 04:12 | 2 | 99 | Counter G78409 installed |
| 71050725 | 2012 | 089 | 03:57 | 2 | 99 | Counter G71203 installed |
| 71050725 | 2012 | 082 | 05:15 | 2 | 99 | Counter G71204 installed |
| 71050725 | 2012 | 069 | 04:30 | 2 | 99 | Counter G77376 installed |
| 71050725 | 2012 | 068 | 06:20 | 2 | 99 | Counter G78762 installed |
| 71050725 | 2012 | 044 | 04:16 | 2 | 99 | Low loss cable changed |
| 71050725 | 2011 | 332 | 13:99 | 2 | 99 | Reversed cables for M7 SLR tracking. |
| 71050725 | 2011 | 332 | 11:00 | 2 | 9 | Removed W518 start cable from 5370B transmit delayed counter. Installed start diode to cable. |
| 71050725 | 2011 | 237 | 13:00 | 1 | 6.01.01 | Removed RUB 100s and installed Phillips Scientific #460. |
| 71050725 | 2011 | 235 | 14:51 | 2 | 99 | M5.8 Earthquake about 94 miles from Greenbelt near Mineral, VA - survey post earthquake shows no conclusive change |
| 71050725 | 2011 | 153 | 02:10 | 2 | 99 | Counter G78769 installed |
| 71050725 | 2011 | 143 | 08:29 | 2 | 99 | Took card from G77977 and installed into G78768. |
| 71050725 | 2011 | 141 | 09:20 | 2 | 99 | Counter G71279 installed |
| 71050725 | 2011 | 140 | 10:18 | 2 | 99 | Counter G78768 installed |
| 71050725 | 2011 | 136 | 12:17 | 2 | 99 | Counter G78769 installed |
| 71050725 | 2011 | 130 | 08:55 | 2 | 99 | Counter G78793 installed |
| 71050725 | 2011 | 124 | 11:35 | 2 | 99 | Counter G71283 installed |
| 71050725 | 2011 | 119 | 01:41 | 2 | 99 | Counter G78777 installed |
| 71050725 | 2011 | 115 | 06:12 | 2 | 09.01 | Changed XL-DC antenna |
| 71050725 | 2011 | 111 | 09:22 | 2 | 99 | Installed Counter |
| 71050725 | 2011 | 109 | 01:35 | 1 | 9 | Replaced G77390 with CNS Clock G77945. |
| 71050725 | 2011 | 108 | 00:50 | 1 | 9 | CNS Clock G77945 replaced with G77390. |
| 71050725 | 2011 | 097 | 15:00 | 1 | 12.02.01 | MET4 G71224 Installed T = 13.2; H = 54.3 and B = 1011.17 |
| 71050725 | 2011 | 097 | 14:27 | 1 | 12.02.01 | MET4 G78677 replaced T = -0.12.4 H = 56.4; B = 1010.67 |
| 71050725 | 2011 | 081 | 00:00 | 2 | 99 | HP-5370B Counter G78023 Removed and G78775 Installed |
| 71050725 | 2011 | 066 | 11:06 | 2 | 99 | Installed G78769 counter into system for satellite tracking. |
| 71050725 | 2011 | 062 | 06:41 | 2 | 99 | Installed counter G78023 into system. |
| 71050725 | 2011 | 062 | 05:01 | 2 | 99 | Installed counter G78770 into system. |
| 71050725 | 2011 | 062 | 03:36 | 2 | 99 | Installed counter G71283 into system. |
| 71050725 | 2011 | 059 | 04:01 | 2 | 99 | Installed counter G78793 into system. |
| 71050725 | 2011 | 053 | 06:58 | 2 | 99 | Installed counter G78775 into system. |
| 71050725 | 2011 | 047 | 00:01 | 2 | 99 | Returned M7 counter G78769 back into system. |
| 71050725 | 2011 | 020 | 08:00 | 2 | 99 | Installed G78761. |
| 71050725 | 2011 | 020 | 07:03 | 2 | 99 | Installed G71203. |
| 71050725 | 2011 | 020 | 05:32 | 2 | 99 | Installed G78777. |
| 71050725 | 2010 | 344 | 13:00 | 1 | 5.01.01 | 10PPS problem found to be replaced oscillator last month had less output power. Removed some attenuation from photo diode (went from .5 @ 5PPS and .38 @ 10pps to 2.3 @ 5PPS and 1.4 @ 10PPS). |
| 71050725 | 2010 | 315 | 21:00 | 1 | 6.01.01 | Problem with PMT discovered elbow HV connector pin out of socket re-assembled all okay. |
| 71050725 | 2010 | 278 | 05:00 | 2 | 99 | G78557 counter not working; install s/n: 2410A00829. |
| 71050725 | 2010 | 265 | 01:00 | 1 | 6.01.01 | Installed M6 MCP; it is operational. |
| 71050725 | 2010 | 224 | 15:30 | 1 | 6.01.01 | Installed ITT MCP; gating module; and delay box for testing. |
| 71050725 | 2010 | 223 | 13:30 | 1 | 6.01.01 | Installed new PMT. |
| 71050725 | 2010 | 197 | 05:00 | 1 | 6.01.01 | Installed M4 MCP. |
| 71050725 | 2010 | 149 | 02:17 | 2 | 99 | Counter changes(G78501; and ECN 095894). |
| 71050725 | 2010 | 147 | 00:00 | 2 | 99 | Multiple counter changes throughout the day (G78501; G78380; G78024; G78557; G78501; then G78557) |
| 71050725 | 2010 | 143 | 11:53 | 2 | 99 | Installed G78501 counter into the system. |
| 71050725 | 2010 | 143 | 06:54 | 2 | 99 | Installed G78612 counter into system. |
| 71050725 | 2010 | 138 | 05:30 | 2 | 99 | Installed M7 spare counter (G78409) into system for two passes; then returned M7 original back into system (G78557) |
| 71050725 | 2010 | 132 | 10:36 | 1 | 9 | 10MHz is removed from back of 5370B counters for future testing of spare 5370Bs. |
| 71050725 | 2009 | 334 | 00:00 | 1 | 9.01.01 | Failed XL-DC unit (G77108) replaced with G77401. |
| 71050725 | 2009 | 302 | 00:00 | 1 | 9.01.01 | Changed out GPS antenna. |
| 71050725 | 2009 | 297 | 00:00 | 1 | 9 | Replaced CNS clock. |
| 71050725 | 2009 | 274 | 14:36 | 1 | 12.02.01 | MET3 Removed MET4 74875 Installed |
| 71050725 | 2009 | 254 | 12:45 | 2 | 99 | Installed backup counter to compare with operational unit to troubleshoot 10PPS range word error. |
| 71050725 | 2009 | 252 | 14:00 | 2 | 99 | Had to modify the boards (switched a wire on all 4 boards). |
| 71050725 | 2009 | 192 | 00:00 | 2 | 99 | Switched out LRC board for 10PPS. |
| 71050725 | 2009 | 136 | 00:00 | 0 | 99 | Troubleshot discriminator/NIMBIN issues (removing/installing cards/power supply). |
| 71050725 | 2009 | 135 | 00:00 | 0 | 99 | Lost -6 volts; replaced receive discriminator. |
| 71050725 | 2009 | 134 | 00:00 | 0 | 99 | NIMBIN Power Supply replaced. |
| 71050725 | 2009 | 113 | 00:00 | 0 | 99 | Replaced NIMBIN with one on slides. |
| 71050725 | 2009 | 093 | 00:00 | 1 | 99 | Installed M4 discriminator. |
| 71050725 | 2009 | 089 | 00:00 | 1 | 99 | Changed operational discriminator with spare from GCP. |
| 71050725 | 2009 | 078 | 00:00 | 1 | 6 | Removed old receive cable and ran the spare receive cable; installed new processor computer |
| 71050725 | 2009 | 072 | 13:00 | 1 | 5.0 | Laser EC-010-09-2007 (chg-1) Laser Chiller Upgrade |
| 71050725 | 2009 | 065 | 00:00 | 1 | 6.01.01 | Replaced MCP Cable to correct system delay. |
| 71050725 | 2009 | 041 | 00:00 | 2 | 9 | Stability tests showed system delay drifts; replaced 5 MHz cable from Dist. Amp to 5370B. |
| 71050725 | 2009 | 037 | 13:00 | 2 | 99 | Computer EC-016-04-2009 (chg-1) Processor Computer Upgrade |
| 71050725 | 2008 | 293 | 13:00 | 1 | 5.01 | Laser EC-015-10-2008 (rev 1) Laser Dye Cell Replacement (7/20/09) |
| 71050725 | 2008 | 195 | 00:00 | 0 | 99 | Changed circuit breaker and moved from phase "C" to phase "A". |
| 71050725 | 2008 | 151 | 13:00 | 1 | 99 | Removed Td connections at patch for signals going to 53131A counter for extended testing of GPS v Rb. |
| 71050725 | 2008 | 143 | 13:00 | 1 | 99 | Td connections at patch for signals going to 53131A counter for extended testing of GPS v Rb. |
| 71050725 | 2008 | 115 | 00:00 | 1 | 9 | Installed cable on 5370B 10MHz to drive 53132A counter being used for LRO M7 timing study. |
| 71050725 | 2008 | 079 | 00:00 | 2 | 9 | Switched 5370B; new unit G78557 (old unit G78382). |
| 71050725 | 2008 | 073 | 00:00 | 2 | 12.01.02 | Replaced MET3 with spare from GCP (G78390). |
| 71050725 | 2008 | 064 | 00:00 | 2 | 12.01.01 | G78440 MET-3 replaced with G78502 MET-3. |
| 71050725 | 2007 | 273 | 13:00 | 2 | 99 | Computer EC-011-11-2007 (chg-1) Controller Computer Upgrade |
| 71050725 | 2007 | 258 | 13:00 | 0 | 99 | UPS EC-009-09-2007 APC UPS Upgrade Installation |
| 71050725 | 2007 | 226 | 00:00 | 2 | 9 | 5370B reading error; removed and checked system configured internally; re-installed after checking okay offline; worked fine after re-installation). |
| 71050725 | 2007 | 169 | 03:00 | 2 | 9 | Installed spare 5370B (G78382). |
| 71050725 | 2007 | 043 | 00:00 | 2 | 99 | G77973 model 53131A re-installed. |
| 71050725 | 2007 | 008 | 00:00 | 2 | 99 | G77342 model 5334B counter replaced with G77618 model 53131A. Replaced G77392 model 53131A with G77973 model 53131A. M7 counters in calibration. |
| 71050725 | 2006 | 150 | 07:20 | 2 | 9 | Problem with Radar was traced to TCG; bad cap A10 C1. Repaired. |
| 71050725 | 2006 | 121 | 00:36 | 1 | 12.03.01 | Changed out the MET3 unit. |
| 71050725 | 2006 | 006 | 00:00 | 1 | 12.03.01 | New calibrated MET-3 installed & verified. |
| 71050725 | 2005 | 131 | 00:00 | 2 | 99 | 5370B removed to connect T-4s 5370B. Cable not connected back up when done. |
| 71050725 | 2004 | 328 | 10:04 | 2 | 99 | Removed 5370B L-3111 (G77264) replaced with G78380. |
| 71050725 | 2004 | 279 | 00:00 | 1 | 9 | Replaced C1 of U1:A board 10 of TCG. |
| 71050725 | 2004 | 265 | 23:57 | 1 | 9 | Found BNC connector on TCG bad; repaired. |
| 71050725 | 2003 | 343 | 21:00 | 1 | 99 | L-5848 removed. |
| 71050725 | 2003 | 318 | 13:00 | 0 | 99 | Connected a 1PPS cable to the TCG for the GUTS system. |
| 71050725 | 2003 | 272 | 13:00 | 1 | 12.01.01 | New Met sensor installed; hung-up OAM; added sync cable for the GUTS system to M7 controller. |
| 71050725 | 2003 | 210 | 19:00 | 1 | 9 | Returned the TIU counter. |
| 71050725 | 2003 | 197 | 21:00 | 1 | 6.01.01 | Troubleshot the MCP tube; found it bad/removed. |
| 71050725 | 2003 | 195 | 13:00 | 1 | 6 | Changed receive cable. |
| 71050725 | 2003 | 186 | 13:00 | 1 | 6.01.01 | New PMT (21021004) and new CFD (867) installed. |
| 71050725 | 2003 | 161 | 21:30 | 1 | 6.01.01 | M7 MCP & CFD re-installed (CFD #867/PMT #21021004 replaced with CFD #265 and PMT #43020531). |
| 71050725 | 2003 | 121 | 20:09 | 1 | 6.01.01 | New MCP/CFD combination installed. |
| 71050725 | 2003 | 093 | 05:00 | 2 | 99 | Removed L-5848 and replaced with L-4970 after original stopped counting; reinstalled original after GCP checked it out and founding nothing wrong. |
| 71050725 | 2003 | 084 | 17:51 | 1 | 6.01.01 | Installed M6 Photek PMT and CFD for testing. |
| 71050725 | 2003 | 056 | 02:00 | 1 | 6 | Change new receive cable to PP1. |
| 71050725 | 2003 | 044 | 15:00 | 1 | 9 | TIU start/stop/BNC Adapter replaced. |
| 71050725 | 2003 | 032 | 21:00 | 1 | 99 | Installed L-3398 CFD. |
| 71050725 | 2003 | 016 | 19:16 | 1 | 99 | Installed L-5848. |
| 71050725 | 2003 | 015 | 13:00 | 2 | 99 | Multiple swaps in/out of 5370B; original unit re-installed. |
| 71050725 | 2003 | 012 | 13:00 | 2 | 99 | Replaced 5370B L-3111. |
| 71050725 | 2002 | 329 | 20:43 | 1 | 6.01.01 | M4 MCP/CFD equipment removed and M7 version installed. |
| 71050725 | 2002 | 326 | 13:00 | 1 | 6.01.01 | New photek PMT installed s/n: 42020802 for system testing. M4 CFD was left in the system. |
| 71050725 | 2002 | 304 | 14:11 | 1 | 6.01.01 | Installed Photek MCP/PMT s/n: 42020531 to conduct testing of the tube and CVD for M4 (M7s CFD L-5167 removed to install M4s unit). |
| 71050725 | 2002 | 236 | 13:00 | 1 | 6 | New receive cable broken replaced with old cable. |
| 71050725 | 2002 | 236 | 13:00 | 1 | 6 | New receive cable put back in. |
| 71050725 | 2002 | 225 | 13:00 | 1 | 6 | all Installed s/n 43020531 MCP. |
| 71050725 | 2002 | 224 | 13:00 | 1 | 6.01.01 | Switched back to ITT MCP. |
| 71050725 | 2002 | 220 | 18:18 | 1 | 6.01.01 | Installed s/n 23020625 Photek MCP. |
| 71050725 | 2002 | 217 | 22:57 | 1 | 6.01.01 | Photek PMT swapped for new unit (s/n 43020531). |
| 71050725 | 2002 | 214 | 00:00 | 1 | 6.01.01 | New Photek PMT installed |
| 71050725 | 2002 | 202 | 23:15 | 1 | 99 | Swapped out discriminators L-3398 with L-5167 (L-3398 was noisy). |
| 71050725 | 2002 | 189 | 13:00 | 1 | 99 | NIMBIN power supply replaced. |
| 71050725 | 2002 | 171 | 20:53 | 1 | 9.01.01 | LX-DC removed and replaced with L-5803 |
| 71050725 | 2002 | 119 | 17:34 | 1 | 9 | HP5087A replaced (L-4011 swapped with L-4088). |
| 71050725 | 2002 | 028 | 13:00 | 2 | 6.01.01 | MCP from GCP testing. |
| 71050725 | 2002 | 014 | 00:00 | 1 | 12.01.01 | Replaced MET 3 sensor with newly NIST certified unit. |
| 71050725 | 2001 | 352 | 13:00 | 1 | 6.01.01 | ETN 026-628 Burle 85104 MCP-PMT Testing installed. |
| 71050725 | 2001 | 312 | 13:00 | 2 | 6.01.01 | New PMT cable installed. |
| 71050725 | 2001 | 310 | 14:38 | 2 | 9.01.01 | Pulled the XL-DC L-5536 (unit to be refurbished/replaced) and replaced with s/n: 010514244. |
| 71050725 | 2001 | 307 | 04:04 | 0 | 9.01.01 | Batteries replaced in timing standby power supply (L-4296). Power cord replaced for the Truetime GPS & Freq. Standard. |
| 71050725 | 2001 | 284 | 21:26 | 1 | 9.01.01 | Standby Power Supply issues repaired. Attempt to replace XL-DC but spare was unable to lock so original was returned to system. |
| 71050725 | 2001 | 284 | 13:00 | 1 | 9.01.01 | Spare frequency receiver installed. |
| 71050725 | 2001 | 267 | 13:00 | 2 | 6.01.01 | Installed MCP from GCP (Hollis). |
| 71050725 | 2001 | 255 | 13:00 | 2 | 6.01.01 | PMT swapped out. |
| 71050725 | 2001 | 245 | 17:00 | 2 | 6.01.01 | MCP down; repaired; system back operational. |
| 71050725 | 2001 | 243 | 21:00 | 2 | 6.01.01 | MCP problem; changed out signal cable. |
| 71050725 | 2001 | 236 | 05:00 | 2 | 99.01.01 | Installed new Tac324 program. |
| 71050725 | 2001 | 035 | 21:00 | 1 | 6.01.01 | MCP removed/eyepiece is in. |
| 71050725 | 1999 | 309 | 16:00 | 1 | 9 | Replaced the TCG Power Supply. |
| 71050725 | 1999 | 228 | 13:00 | 1 | 11 | Radar Installed Radar Safety Upgrade 20 PPS @50% duty cycle mode to A10 card of TCG. |
| 71050725 | 1999 | 084 | 05:00 | 2 | 6 | repaired MCP cable and re-tied cables to reduce strain. |
| 71050725 | 1999 | 063 | 16:00 | 1 | 9.01.01 | GPS Trimble GPS (L-4643) and its antenna removed. |
| 71050724 | 1999 | 049 | 17:00 | 2 | 6 | Replaced receive PMT cable. |
| 71050724 | 1999 | 035 | 23:00 | 2 | 9 | New cables installed to OAM & PMT. |
| 71050724 | 1998 | 339 | 13:00 | 1 | 9 | Connected 10MHz line from distribution amplifier to TCG. |
| 71050724 | 1998 | 315 | 17:00 | 1 | 9.01.01 | GPS and Frequency standard switch installed. |
| 71050724 | 1998 | 194 | 13:00 | 1 | 9.01.01 | Swapped Cesium L-4256 with L04296. |
| 71050724 | 1997 | 315 | 13:00 | 1 | 12.03.01 | Barometer now working; replaced multiplexer board. |
| 71050724 | 1997 | 163 | 05:00 | 1 | 99 | Pulse Generator card removed from NIMBIN. |
| 71050724 | 1997 | 161 | 13:00 | 1 | 9.01.01 | GPS equipment removed. |
| 71050724 | 1997 | 150 | 13:00 | 2 | 6.01.01 | MCP Receive cable replaced (broken). |
| 71050724 | 1997 | 093 | 17:00 | 0 | 99 | Interchanged U7 & J9 in ARSU to eliminate relay chattering. |
| 71050724 | 1997 | 086 | 17:00 | 1 | 5 | Krytron change out |
| 71050724 | 1997 | 084 | 13:00 | 1 | 99 | ARSU installed similar to Moblas-6 unit. |
| 71050724 | 1996 | 318 | 21:00 | 2 | 5.01 | Completed installation of MCP cable with new range counter. |
| 71050724 | 1996 | 250 | 21:00 | 2 | 9.01.01 | Installed MLRO Timing cables to/from TCG and distribution amplifier. |
| 71050724 | 1996 | 117 | 14:00 | 1 | 5.01 | Repaired PMT HV Supply Monitor Circuit. |
| 71050724 | 1996 | 096 | 16:00 | 0 | 99 | Replaced defective switch on ARSU. |
| 71050724 | 1996 | 089 | 16:00 | 2 | 5.01 | MCP & HSLR discriminator returned; re-cabled integrator gating to match block diagram. |
| 71050724 | 1996 | 088 | 16:00 | 0 | 9.01.01 | Replaced 20pps cable from Time Code Generator to Encoders cable #W315 |
| 71050724 | 1996 | 072 | 06:00 | 0 | 99 | Corrected wiring error in LRC. Correct window now triggering the A-Scope |
| 71050724 | 1996 | 023 | 05:00 | 0 | 9.01.01 | Cesium 161B replaced with cesium 870. New STA-Cs = 198.5 microsecs. TCG Leap year switch activated. |
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