| SOD | Year | Day of Year |
Time of Day |
Data Impact | System | Description |
|---|---|---|---|---|---|---|
| 70900513 | 2024 | 043 | 05:00 | 2 | 06.01 | MCP voltage now -3400V for calibration and pass |
| 70900513 | 2024 | 043 | 05:00 | 2 | 06.02 | MCP voltage now -3400V @night -3200V@day for calibration and pass |
| 70900513 | 2023 | 349 | 03:05 | 2 | 12.01.02 | New paroscientific met4 unit and cable installed |
| 70900513 | 2023 | 294 | 03:00 | 2 | 06.01 | New ARSU installed with non-bypassed amplifier |
| 70900513 | 2023 | 294 | 03:00 | 2 | 06.02 | New ARSU installed with non-bypassed amplifier |
| 70900513 | 2023 | 266 | 07:00 | 2 | 12.01.02 | MET4 comms errors, SLR MET4 removed and manually inputting meteorological data from the VLBI MET4 |
| 70900513 | 2023 | 256 | 08:00 | 2 | 05.01 | Laser now running full power - parasitic lasing eliminated |
| 70900513 | 2023 | 206 | 02:00 | 2 | 10.03 | New data processor PC installed |
| 70900513 | 2023 | 205 | 04:00 | 2 | 09.01 | GPS antenna splitter installed so XL-DC and CNS1 clock share common antenna |
| 70900513 | 2023 | 205 | 04:00 | 2 | 09.02 | GPS antenna splitter installed so XL-DC and CNS1 clock share common antenna |
| 70900513 | 2023 | 172 | 08:15 | 2 | 09.01.01 | 1pps signal from prime XL-DC splitter removed providing more stable pulse to LRC and system |
| 70900513 | 2023 | 139 | 00:00 | 2 | 05.01 | Laser problems associated with pu430 amplfier power unit - ongoing |
| 70900513 | 2023 | 138 | 02:00 | 2 | 05.01 | oscillator flash lamps changed |
| 70900513 | 2023 | 135 | 04:00 | 2 | 05.01 | Amplifier flash lamps changed |
| 70900513 | 2023 | 087 | 19:00 | 2 | 06.01 | Heavy downpour (wet MCP?) increased system delay by 100-200pS for approx 24 hours |
| 70900513 | 2023 | 087 | 19:00 | 2 | 06.02 | Heavy downpour (wet MCP?) increased system delay by 100-200pS for approx 24 hours |
| 70900513 | 2023 | 017 | 06:30 | 2 | 06.01 | Low loss receive cable replaced |
| 70900513 | 2023 | 017 | 06:30 | 2 | 06.02 | Low loss receive cable replaced |
| 70900513 | 2022 | 324 | 00:00 | 2 | 06.01 | MCP voltage now 3200V-calibration ; 3200-3400V satellite |
| 70900513 | 2022 | 324 | 00:00 | 2 | 06.02 | MCP voltage now 3200V-calibration ; 3200V satellite daytime-3400-3700V night |
| 70900513 | 2022 | 263 | 19:00 | 2 | 05.01 | laser amplifier flashlamps changed |
| 70900513 | 2022 | 104 | 08:00 | 2 | 10.03 | New CRDv2 hpldp(v9.11.3) and gnp(v2.8.3) installed. CRD v1&v2 data supplied in parallel |
| 70900513 | 2022 | 081 | 08:00 | 2 | 06.01 | Low loss receive cable replaced |
| 70900513 | 2022 | 081 | 08:00 | 2 | 06.02 | Low loss receive cable replaced |
| 70900513 | 2022 | 066 | 03:00 | 2 | 06.01 | Jump in system delay when airconditioner maintenance performed in console area |
| 70900513 | 2022 | 066 | 03:00 | 2 | 06.02 | Jump in system delay when airconditioner maintenance performed in console area |
| 70900513 | 2021 | 347 | 12:00 | 2 | 04.01 | Star calibration performed to correct -0.020 degree offset in azimuth |
| 70900513 | 2021 | 343 | 19:00 | 2 | 04.01 | Telescope mount driven hard into and through hard limits - azimuth became offset by ~-0.02 degrees |
| 70900513 | 2021 | 140 | 09:30 | 2 | 06.01 | Low loss receive cable replaced ( 2801RN vs 2801RW) |
| 70900513 | 2021 | 140 | 09:30 | 2 | 06.02 | Low loss receive cable replaced ( 2801RN vs 2801RW) |
| 70900513 | 2021 | 101 | 13:00 | 2 | 03.19 | Category 3 cyclone impacted site - some slight change in eccentricities possible |
| 70900513 | 2020 | 357 | 06:30 | 2 | 06.01 | MCP standard voltage now -3400V |
| 70900513 | 2020 | 357 | 06:30 | 2 | 06.02 | MCP standard voltage now -3400V at night; -3200V during day |
| 70900513 | 2020 | 283 | 05:30 | 2 | 05.02 | PD-10 Start Diode cable upgraded to low loss type vs RG214 |
| 70900513 | 2020 | 267 | 08:00 | 2 | 06.01 | Low loss receive cable (350 type) replaced |
| 70900513 | 2020 | 267 | 08:00 | 2 | 06.02 | Low loss receive cable (350 type) replaced |
| 70900513 | 2020 | 197 | 00:00 | 2 | 05.01 | PD-10 start diode back on battery power |
| 70900513 | 2020 | 196 | 00:00 | 2 | 06.01 | Receive combiners remounted - new start and stop cables |
| 70900513 | 2020 | 196 | 00:00 | 2 | 06.02 | Receive combiners remounted - new start and stop cables |
| 70900513 | 2020 | 153 | 00:00 | 2 | 06.01 | MCP standard voltage now -3200V |
| 70900513 | 2020 | 153 | 00:00 | 2 | 06.02 | MCP standard voltage now -3200V |
| 70900513 | 2020 | 143 | 10:00 | 2 | 05.01 | PD-10 start diode power source swapped from battery to mains supply - NIL batteries |
| 70900513 | 2020 | 126 | 00:00 | 2 | 06.01.04 | Event Timer now reset 3-4 times per day vs once to ensure precision <=2 |
| 70900513 | 2020 | 126 | 00:00 | 2 | 06.02.04 | Event Timer now reset 3-4 times per day vs once to ensure precision <=2 |
| 70900513 | 2020 | 018 | 00:00 | 2 | 07.01 | Default laser rep rate for Etalon and Glonass now 5pps vs 4pps |
| 70900513 | 2019 | 321 | 07:00 | 2 | 09.01 | Timing rack powered down during mains outage |
| 70900513 | 2019 | 321 | 07:00 | 2 | 09.02 | Timing rack powered down during mains outage |
| 70900513 | 2019 | 174 | 04:00 | 2 | 06.01 | Low loss receive cable (350 type) replaced |
| 70900513 | 2019 | 174 | 04:00 | 2 | 06.02 | Low loss receive cable (350 type) replaced |
| 70900513 | 2019 | 135 | 08:38 | 2 | 05.01 | Laser amplifier flashlamps changed |
| 70900513 | 2019 | 127 | 14:00 | 2 | 09.02.01 | Event Timer 1pps input direct from LRC (bypasses Event Timer Computer) |
| 70900513 | 2019 | 080 | 06:00 | 0 | 09.02.01 | CNS-I reference clock swapped out for upgraded unit |
| 70900513 | 2018 | 354 | 04:00 | 2 | 09.01.01 | XL-DC units swapped - 99173237 out; 994912244 in |
| 70900513 | 2018 | 240 | 07:00 | 2 | 06.01 | Low loss receive cable (350 type) replaced |
| 70900513 | 2018 | 240 | 07:00 | 2 | 06.02 | Low loss receive cable (350 type) replaced |
| 70900513 | 2017 | 254 | 13:00 | 2 | 06.01 | Event Timer Cybi_ETM-02 sn 011 prime CF incremented to 6 |
| 70900513 | 2017 | 254 | 13:00 | 2 | 06.02 | Event Timer Cybi_ETM-02 sn 011 prime CF incremented to 6 |
| 70900513 | 2017 | 072 | 04:00 | 2 | 06.01 | MCP changed: sn108507 removed sn128801 installed |
| 70900513 | 2017 | 072 | 04:00 | 2 | 06.02 | MCP changed: sn108507 removed sn128801 installed |
| 70900513 | 2017 | 028 | 11:00 | 2 | 05.01 | Amplifier flash lamps changed |
| 70900513 | 2016 | 321 | 07:00 | 2 | 06.01 | Low loss receive cable (350 type) replaced |
| 70900513 | 2016 | 321 | 07:00 | 2 | 06.02 | Low loss receive cable (350 type) replaced |
| 70900513 | 2016 | 234 | 08:00 | 2 | 05.01 | Oscillator flash lamps changed |
| 70900513 | 2016 | 230 | 07:00 | 0 | 05.01 | transmit telescope dried out and rebuilt |
| 70900513 | 2016 | 064 | 08:00 | 0 | 09.02.01 | 1PPS station UTC reference now derived from XL-DC and LRC. TCG removed |
| 70900513 | 2016 | 053 | 08:00 | 0 | 06.01 | LRC circuit board replaced |
| 70900513 | 2016 | 053 | 08:00 | 0 | 06.02 | LRC circuit board replaced |
| 70900513 | 2015 | 330 | 05:55 | 2 | 06.01 | TIU Optimization performed - Start -0.30V Stop -0.25V |
| 70900513 | 2015 | 330 | 05:55 | 2 | 06.02 | TIU Optimization performed - Start -0.30V Stop -0.25V |
| 70900513 | 2015 | 330 | 05:54 | 2 | 06.01 | HP5370B modified - input termination resistors soldered in |
| 70900513 | 2015 | 330 | 05:54 | 2 | 06.02 | HP5370B modified - input termination resistors soldered in |
| 70900513 | 2015 | 295 | 15:00 | 2 | 06.01 | HP5370B (sn2438A01106) replaced with HP5370B (sn2740A02007) |
| 70900513 | 2015 | 295 | 15:00 | 2 | 06.02 | HP5370B (sn2438A01106) replaced with HP5370B (sn2740A02007) |
| 70900513 | 2015 | 213 | 04:15 | 2 | 06.01 | TIU Optimization performed |
| 70900513 | 2015 | 213 | 04:15 | 2 | 06.02 | TIU Optimization performed |
| 70900513 | 2015 | 213 | 04:00 | 2 | 06.01 | Low loss receive cable (350 type) replaced |
| 70900513 | 2015 | 213 | 04:00 | 2 | 06.02 | Low loss receive cable (350 type) replaced |
| 70900513 | 2015 | 193 | 06:00 | 2 | 06.01 | CFD Alignment to suit ITT F4129 MCP - chn4 delay cable=119mm z=-5.7mV |
| 70900513 | 2015 | 105 | 06:15 | 2 | 06.01 | TIU Optimization performed |
| 70900513 | 2015 | 105 | 06:15 | 2 | 06.02 | TIU Optimization performed |
| 70900513 | 2015 | 082 | 05:00 | 2 | 06.01.01 | ITT F4129 MCP reinstalled |
| 70900513 | 2015 | 082 | 05:00 | 2 | 06.02.01 | ITT F4129 MCP reinstalled |
| 70900513 | 2015 | 082 | 04:40 | 2 | 06.01.02 | Photek 318SA MCP removed due to degradation |
| 70900513 | 2015 | 082 | 04:40 | 2 | 06.02.02 | Photek 318SA MCP removed due to degradation |
| 70900513 | 2015 | 055 | 05:00 | 0 | 11.01 | Aircraft safety radar removed for repair - tuning errors |
| 70900513 | 2015 | 051 | 06:27 | 1 | 09.01.01 | XL-DC Rubidium now prime for SLR |
| 70900513 | 2015 | 051 | 06:00 | 3 | 09.01.02 | Jump noticed in station time - occurred sometime after 00:30 |
| 70900513 | 2015 | 051 | 06:00 | 3 | 09.01.02 | Maser reference signals degraded at SLR van |
| 70900513 | 2015 | 050 | 04:00 | 0 | 09.02.01 | GPS time (IRIG-B) for servo pc now on XL-DC (Rb) |
| 70900513 | 2015 | 007 | 03:00 | 0 | 09.01.02 | Extra insulation added to Maser room |
| 70900513 | 2014 | 354 | 00:00 | 1 | 10.03 | Correct NORAD number now inserted into frd and crd headers |
| 70900513 | 2014 | 348 | 07:40 | 2 | 06.01 | Low loss receive cable (350 type) replaced |
| 70900513 | 2014 | 348 | 07:40 | 2 | 06.02 | Low loss receive cable (350 type) replaced |
| 70900513 | 2014 | 323 | 04:00 | 1 | 07.01 | Minimum tracking elevation reduced to 10 degrees |
| 70900513 | 2014 | 323 | 02:00 | 0 | 11.01 | Aircraft safety radar performance validated down to 10 degrees elevation |
| 70900513 | 2014 | 192 | 04:00 | 0 | 11.01 | Aircraft safety radar returned to service after rebuild |
| 70900513 | 2014 | 171 | 04:00 | 0 | 04.01 | Elevation tachometer replaced |
| 70900513 | 2014 | 129 | 07:00 | 2 | 06.01 | TIU Optimization performed |
| 70900513 | 2014 | 129 | 07:00 | 2 | 06.02 | TIU Optimization performed |
| 70900513 | 2014 | 129 | 04:00 | 2 | 06.01 | Low loss receive cable (350 type) replaced (3.2nS short) |
| 70900513 | 2014 | 129 | 04:00 | 2 | 06.02 | Low loss receive cable (350 type) replaced (3.2nS short) |
| 70900513 | 2014 | 129 | 00:36 | 1 | 09.01.01 | -1.1uS time step on (TCG) station time |
| 70900513 | 2014 | 097 | 06:20 | 2 | 09.01.01 | TIU external reference on Maser 10Mhz |
| 70900513 | 2014 | 097 | 03:30 | 1 | 12.01.02 | MET4 replaced - calibration cycle |
| 70900513 | 2014 | 097 | 03:30 | 1 | 12.02.02 | MET4 replaced - calibration cycle |
| 70900513 | 2014 | 097 | 03:30 | 1 | 12.03.02 | MET4 replaced - calibration cycle |
| 70900513 | 2014 | 061 | 04:00 | 1 | 07.01 | Minimum tracking elevation reduced to 14 degrees |
| 70900513 | 2014 | 052 | 07:15 | 2 | 09.01.01 | TIU external reference on XL-DC (Rubidium) 10Mhz |
| 70900513 | 2014 | 050 | 07:00 | 2 | 05.01 | PD-10 Start diode back on internal battery supply |
| 70900513 | 2014 | 036 | 02:00 | 2 | 05.01 | PD-10 Start diode on external power supply |
| 70900513 | 2014 | 031 | 00:12 | 1 | 09.01.01 | -1uS time step on (TCG) station time |
| 70900513 | 2014 | 017 | 04:40 | 1 | 06.01 | TIU Optimization performed |
| 70900513 | 2014 | 017 | 04:40 | 1 | 06.02 | TIU Optimization performed |
| 70900513 | 2014 | 016 | 04:00 | 1 | 05.01 | Laser start pulse adjusted from -3V down to -1.5V |
| 70900513 | 2013 | 225 | 03:10 | 0 | 04.01 | Servo amplifiers repaired - station green |
| 70900513 | 2013 | 224 | 11:00 | 0 | 04.01 | Servo amplifiers failed - station red |
| 70900513 | 2013 | 217 | 09:20 | 0 | 04.01 | Servo amplifiers repaired - station green |
| 70900513 | 2013 | 215 | 09:00 | 1 | 05.01 | New oven controlled second harmonic generator installed |
| 70900513 | 2013 | 208 | 18:15 | 0 | 04.01 | Servo amplifiers failed - station red |
| 70900513 | 2013 | 118 | 08:00 | 1 | 05.01 | Oscillator flash lamps changed |
| 70900513 | 2013 | 094 | 09:00 | 1 | 04.01 | ITT az and el encoder mod done |
| 70900513 | 2013 | 042 | 02:00 | 1 | 06.01 | Receive Integrator aligned |
| 70900513 | 2013 | 042 | 02:00 | 1 | 06.02 | Receive Integrator aligned |
| 70900513 | 2013 | 004 | 00:30 | 2 | 06.01.02 | Replacement Photek 318SA MCP (sn 42101112) installed |
| 70900513 | 2013 | 004 | 00:30 | 2 | 06.02.02 | Replacement Photek 318SA MCP (sn 42101112) installed |
| 70900513 | 2012 | 361 | 13:30 | 2 | 06.01.02 | Photek 318SA MCP failed |
| 70900513 | 2012 | 361 | 13:30 | 2 | 06.02.02 | Photek 318SA MCP failed |
| 70900513 | 2012 | 306 | 02:00 | 2 | 99 | Workshop and stores vans moved away from SLR vans |
| 70900513 | 2012 | 258 | 00:10 | 2 | 09.01.02 | Maser stable - now prime for SLR and LRO |
| 70900513 | 2012 | 258 | 00:10 | 1 | 09.01.01 | XL-DC Rubidium now standby/backup for SLR and LRO |
| 70900513 | 2012 | 252 | 08:00 | 2 | 06.01 | Low loss receive cable (350 type) replaced |
| 70900513 | 2012 | 252 | 08:00 | 2 | 06.02 | Low loss receive cable (350 type) replaced |
| 70900513 | 2012 | 252 | 02:00 | 2 | 10.03 | New generic normal point software - gnp (v2.7.4) |
| 70900513 | 2012 | 248 | 19:48 | 2 | 09.01.01 | XL-DC Rubidium now prime for SLR and LRO |
| 70900513 | 2012 | 248 | 19:40 | 2 | 09.01.02 | Maser unlock errors |
| 70900513 | 2012 | 240 | 00:00 | 0 | 11.01 | Aircraft safety radar failed |
| 70900513 | 2011 | 302 | 09:00 | 1 | 06.01 | Low loss receive cable (350 type) replaced |
| 70900513 | 2011 | 302 | 09:00 | 1 | 06.02 | Low loss receive cable (350 type) replaced |
| 70900513 | 2011 | 196 | 06:00 | 2 | 05.01 | Laser amplifier flash lamps replaced |
| 70900513 | 2011 | 141 | 03:02 | 1 | 12.01.02 | MET4 installed |
| 70900513 | 2011 | 141 | 03:02 | 1 | 12.02.02 | MET4 installed |
| 70900513 | 2011 | 141 | 03:02 | 1 | 12.03.02 | MET4 installed |
| 70900513 | 2011 | 141 | 03:00 | 1 | 12.01.01 | MET3 removed |
| 70900513 | 2011 | 141 | 03:00 | 1 | 12.02.01 | MET3 removed |
| 70900513 | 2011 | 141 | 03:00 | 1 | 12.03.01 | MET3 removed |
| 70900513 | 2010 | 270 | 05:30 | 1 | 04.01 | New version of monitor (v5.3) installed on servo controller pc |
| 70900513 | 2010 | 249 | 09:15 | 1 | 12.01.01 | MET3 replaced - calibration cycle |
| 70900513 | 2010 | 249 | 09:15 | 1 | 12.02.01 | MET3 replaced - calibration cycle |
| 70900513 | 2010 | 249 | 09:15 | 1 | 12.03.01 | MET3 replaced - calibration cycle |
| 70900513 | 2010 | 154 | 19:45 | 2 | 04.01 | New version of sattrk (v7.10) installed on servo controller pc |
| 70900513 | 2010 | 135 | 14:00 | 2 | 09.01.02 | Maser prime ref for slr |
| 70900513 | 2010 | 135 | 09:28 | 2 | 09.01.01 | XL-DC Rubidium failed |
| 70900513 | 2010 | 122 | 00:00 | 2 | 05.01 | Laser amplifier flash lamps replaced, laser aligned |
| 70900513 | 2010 | 075 | 07:00 | 2 | 10.03 | New generic normal point software - gnp (v2.7.3) - crd version, installed |
| 70900513 | 2010 | 067 | 19:00 | 1 | 04.01 | New version of monitor (v5.2) installed on servo controller pc |
| 70900513 | 2009 | 349 | 09:00 | 2 | 09.01.01 | Replacement XL-DC Rubidium installed |
| 70900513 | 2009 | 289 | 09:00 | 1 | 06.01 | Low loss receive cable (350 type) replaced |
| 70900513 | 2009 | 289 | 09:00 | 1 | 06.02 | Low loss receive cable (350 type) replaced |
| 70900513 | 2009 | 271 | 19:00 | 1 | 99 | New 10pps LRC installed. |
| 70900513 | 2009 | 247 | 19:00 | 2 | 04.01 | New servo controller software installed sattrk (v6.00) & monitor (v5.01) |
| 70900513 | 2009 | 184 | 03:00 | 2 | 05.01 | New saturable absorber, pulse slicer and laser table |
| 70900513 | 2009 | 147 | 06:20 | 2 | 06.01.02 | Photek 318SA MCP,new cfd (sn266) and new quad integrator installed |
| 70900513 | 2009 | 147 | 06:20 | 2 | 06.02.02 | Photek 318SA MCP installed |
| 70900513 | 2009 | 145 | 00:00 | 2 | 10.02 | New slr data processor pc installed (DELL Precision 390)new gnp (v2.6.5) |
| 70900513 | 2008 | 097 | 00:00 | 2 | 04.01 | New servo controller pc installed (DELL Precision 380) sattrk (v5.01) |
| 70900513 | 2007 | 300 | 16:00 | 1 | 06.01 | Receive integrator aligned |
| 70900513 | 2007 | 300 | 16:00 | 1 | 06.02 | Receive integrator aligned |
| 70900513 | 2007 | 289 | 07:00 | 1 | 06.01 | Low loss receive cable (350 type) replaced |
| 70900513 | 2007 | 289 | 07:00 | 1 | 06.02 | Low loss receive cable (350 type) replaced |
| 70900513 | 2007 | 286 | 00:00 | 1 | 06.01 | Spare receive cable (RG214) installed |
| 70900513 | 2007 | 286 | 00:00 | 1 | 06.02 | Spare receive cable (RG214) installed |
| 70900513 | 2007 | 261 | 09:00 | 2 | 04.01 | New zero look ahead bias SATTRK (v4.1?) installed |
| 70900513 | 2007 | 059 | 10:00 | 2 | 10.02 | New cpf version of HPLDP installed |
| 70900513 | 2006 | 351 | 14:00 | 1 | 06.01.01 | Low loss receive cable (350 type) replaced |
| 70900513 | 2006 | 351 | 14:00 | 1 | 06.02.01 | Low loss receive cable (350 type) replaced |
| 70900513 | 2006 | 347 | 06:00 | 2 | 10.02 | New generic normal point software - gnp (v2.6) installed |
| 70900513 | 2006 | 226 | 00:00 | 2 | 04.01 | Crack in 75cm corrector plate |
| 70900513 | 2006 | 209 | 06:20 | 1 | 12.01.01 | MET3 replaced - calibration cycle |
| 70900513 | 2006 | 209 | 06:20 | 1 | 12.02.01 | MET3 replaced - calibration cycle |
| 70900513 | 2006 | 209 | 06:20 | 1 | 12.03.01 | MET3 replaced - calibration cycle |
| 70900513 | 2006 | 160 | 09:00 | 2 | 10.02 | New Python NP processing scripts installed |
| 70900513 | 2006 | 138 | 18:00 | 2 | 04.01 | Restricted tracking software (monitor & sattrk) installed |
| 70900513 | 2006 | 002 | 07:00 | 1 | 06.01.01 | Low loss receive cable (350 type) installed |
| 70900513 | 2006 | 002 | 07:00 | 1 | 06.02.01 | Low loss receive cable (350 type) installed |
| 70900513 | 2005 | 358 | 04:00 | 1 | 06.01.01 | Spare receive cable (RG214) installed |
| 70900513 | 2005 | 358 | 04:00 | 1 | 06.02.01 | Spare receive cable (RG214) installed |
| 70900513 | 2005 | 325 | 09:00 | 1 | 04.01 | Daylight Filter replaced |
| 70900513 | 2004 | 051 | 09:00 | 1 | 06.01.01 | Low loss receive cable (350 type) installed |
| 70900513 | 2004 | 051 | 09:00 | 1 | 06.02.01 | Low loss receive cable (350 type) installed |
| 70900513 | 2004 | 047 | 08:00 | 1 | 06.01.01 | Spare receive cable (RG214) installed |
| 70900513 | 2004 | 047 | 08:00 | 1 | 06.02.01 | Spare receive cable (RG214) installed |
| 70900513 | 2003 | 313 | 00:00 | 1 | 06.01.01 | Low loss receive cable (350 type) installed |
| 70900513 | 2003 | 313 | 00:00 | 1 | 06.02.01 | Low loss receive cable (350 type) installed |
| 70900513 | 2003 | 294 | 08:00 | 1 | 05.01 | Oscillator flash lamps changed |
| 70900513 | 2003 | 272 | 16:00 | 1 | 06.01.01 | New MCP HV power supply (SRS-350) installed |
| 70900513 | 2003 | 272 | 16:00 | 1 | 06.02.01 | New MCP HV power supply (SRS-350) installed |
| 70900513 | 2003 | 261 | 16:20 | 2 | 09.01.01 | Replacement XL-DC Rubidium installed |
| 70900513 | 2003 | 219 | 07:00 | 1 | 04.01 | Keyhole software installed on servo controller pc |
| 70900513 | 2003 | 171 | 16:00 | 1 | 99 | New LRC drawer installed |
| 70900513 | 2003 | 161 | 12:00 | 1 | 06.01.01 | Spare receive cable (RG214) installed |
| 70900513 | 2003 | 161 | 12:00 | 1 | 06.02.01 | Spare receive cable (RG214) installed |
| 70900513 | 2003 | 137 | 22:00 | 2 | 06.01.01 | TIU 5370A replaced with 5370B |
| 70900513 | 2003 | 131 | 11:00 | 2 | 06.01.01 | TIU 5370B replaced with spare 5370A |
| 70900513 | 2002 | 200 | 15:00 | 1 | 05.01 | New CB631 installed |
| 70900513 | 2002 | 167 | 04:00 | 1 | 05.01 | Spare CB430 installed in place of failed CB631 |
| 70900513 | 2002 | 070 | 11:25 | 2 | 10.01 | Laser data processing software (v 1.3 inc gnp 2.5.2F) installed on ppc |
| 70900513 | 2002 | 009 | 08:00 | 1 | 06.01.01 | Low loss receive cable (350 type) installed |
| 70900513 | 2002 | 009 | 08:00 | 1 | 06.02.01 | Low loss receive cable (350 type) installed |
| 70900513 | 2001 | 364 | 07:00 | 1 | 06.01.01 | Spare receive cable (RG214) installed |
| 70900513 | 2001 | 364 | 07:00 | 1 | 06.02.01 | Spare receive cable (RG214) installed |
| 70900513 | 2001 | 323 | 00:00 | 1 | 07.01 | Minimum tracking elevation lowered from 20 to 16 degrees |
| 70900513 | 2001 | 310 | 03:00 | 1 | 05.01 | Oscillator flash lamps changed |
| 70900513 | 2001 | 271 | 04:00 | 1 | 06.01.01 | Low loss receive cable (350 type) installed |
| 70900513 | 2001 | 271 | 04:00 | 1 | 06.02.01 | Low loss receive cable (350 type) installed |
| 70900513 | 2001 | 246 | 04:00 | 1 | 06.01.01 | Spare receive cable (RG214) installed |
| 70900513 | 2001 | 246 | 04:00 | 1 | 06.02.01 | Spare receive cable (RG214) installed |
| 70900513 | 2001 | 145 | 23:30 | 1 | 09.01.01 | Replacement TrueTime XL-DC Rb (sn237) installed |
| 70900513 | 2000 | 293 | 02:40 | 1 | 04.01 | 40pps interrupt upgrade to servo controller computer |
| 70900513 | 2000 | 292 | 08:12 | 2 | 09.01.01 | New XL-DC installed as prime frequency reference |
| 70900513 | 2000 | 282 | 01:12 | 2 | 09.01.01 | Cesium 0207 prime frequency reference |
| 70900513 | 2000 | 281 | 00:00 | 2 | 09.01.01 | XL-DC unlocked |
| 70900513 | 2000 | 194 | 20:00 | 2 | 10.01 | NP processing sofware and hpldp installed |
| 70900513 | 2000 | 181 | 15:00 | 2 | 09.01.01 | TrueTime XL-DC Rb installed as prime frequency reference |
| 70900513 | 2000 | 080 | 10:00 | 2 | 05.01 | New 6mm laser oscillator installed |
| 70900513 | 2000 | 071 | 09:20 | 2 | 05.01 | Laser oscillator failed |
| 70900513 | 2000 | 064 | 01:00 | 1 | 12.01.01 | MET3 installed |
| 70900513 | 2000 | 064 | 01:00 | 1 | 12.02.01 | MET3 installed |
| 70900513 | 2000 | 064 | 01:00 | 1 | 12.03.01 | MET3 installed |
| 70900513 | 2000 | 057 | 08:00 | 1 | 04.01 | New version of Sattrk installed |
| 70900513 | 2000 | 040 | 00:00 | 1 | 04.01 | New version of Sattrk installed |
| 70900513 | 2000 | 026 | 19:00 | 1 | 10.01 | hpldp and decod_uniq replaced |
| 70900513 | 1999 | 364 | 06:00 | 1 | 05.01 | Oscillator flash lamps changed |
| 70900513 | 1999 | 264 | 00:00 | 1 | 04.01 | Servo controller software update (Y2K) |
| 70900513 | 1999 | 208 | 12:30 | 1 | 04.01 | New MCP Iris installed |
| 70900513 | 1999 | 167 | 08:00 | 2 | 10.01 | NP processor replaced. New GNP software (version 1.93) |
| 70900513 | 1999 | 095 | 13:00 | 1 | 09.02.01 | CNS-I Clock installed for GPS time reference |
| 70900513 | 1999 | 095 | 04:00 | 1 | 06.01.01 | Low loss receive cable (350 type) replaced |
| 70900513 | 1999 | 095 | 04:00 | 1 | 06.02.01 | Low loss receive cable (350 type) replaced |
| 70900513 | 1998 | 282 | 00:00 | 2 | 04.01 | Telescope secondary mirror reglued |
| 70900513 | 1998 | 211 | 00:00 | 1 | 06.02.01 | HSLR Upgrade installed |
| 70900513 | 1998 | 123 | 07:30 | 2 | 04.01 | Telescope secondary detached ( glue failed temp re-attached mechanically) |
| 70900513 | 1998 | 065 | 17:00 | 2 | 05.01 | Laser oscillator head upgrade (SF611-07 installed) |
| 70900513 | 1998 | 027 | 11:00 | 2 | 06.01.01 | HP5370B set to correct external 5Mhz reference |
| 70900513 | 1998 | 016 | 10:00 | 3 | 06.01.01 | HP5370B installed (with incorrect internal 5Mhz ref) |
| 70900513 | 1998 | 007 | 00:10 | 3 | 06.01.01 | HP5370A failed |
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