| SOD | Year | Day of Year |
Time of Day |
Data Impact | System | Description |
|---|---|---|---|---|---|---|
| 71240802 | 2023 | 140 | 00:00 | 3 | 9 | Removed a +300 nanosecond transmit delay correction to the epochs |
| 71240802 | 2023 | 130 | 19:00 | 0 | 9 | Connected directly the FS740 1pps output to the ETM by using a 95 cm cable. |
| 71240802 | 2023 | 097 | 00:00 | 0 | 6 | Intalled the new ARSU |
| 71240802 | 2023 | 096 | 00:00 | 0 | 9 | Intalled the new GPS steered rubidium (Stanford Research FS740) |
| 71240802 | 2021 | 105 | 00:00 | 0 | 6 | The connector of the gating cable that goes to the MCP was bad. There is no more gating signal on the tracking scope. We disassemble the connector to inspect and repair the connections. |
| 71240802 | 2021 | 103 | 00:00 | 0 | 6 | The "home" wire on the J120 connector was cut. We cut and solder the wire. The OAM is now working correctly. This repair will not last long because the cable is in bad condition, the wires are dry and brittle. We will need you to send us a new cable and J120 and J1 connectors. |
| 71240802 | 2021 | 022 | 00:00 | 0 | 6 | Installed the new low loss transmit cable |
| 71240802 | 2020 | 125 | 00:00 | 3 | 6.01.03 | The HP5370B is no longer primary as of 2020-05-04, its data is not sent to the SLR data centers. Event Timer was installed during station being down to multi issues and data was in quarantine, all quarantined data released from quarantine as of 2020-05-04 when enough data was received and evaluated. |
| 71240802 | 2019 | 297 | 00:00 | 0 | 9 | HP5370 issue. The problem was a faulty switch connection on the counter front panel. The switch was causing the counter to trigger on the trailing edge of the transmit NIM output pulse. The width of the pulse is set to approx. 60nsec. Correcting the problem caused the system delay to shift from 42 nsec to 104 nsec. (62nsec) |
| 71240802 | 2019 | 295 | 00:00 | 3 | 6 | Event Computer replaced TIU after completion of quarantine and verification by ILRS. ETM data started to become available on 2019 DOY 295, and was released from quarantine on 2020 DOY 125. |
| 71240802 | 2013 | 080 | 00:00 | 0 | 05 | replaced laser rod |
| 71240802 | 2012 | 134 | 00:00 | 0 | 06 | repaired High Gain Receiver system for HEO tracking |
| 71240802 | 2010 | 274 | 00:00 | 0 | 10 | replaced HP5370B TIU |
| 71240802 | 2010 | 148 | 00:00 | 0 | 10 | replaced HP5370B TIU |
| 71240802 | 2009 | 307 | 00:00 | 0 | 05 | new h/w and s/w for 10 Hz operations |
| 71240802 | 2009 | 145 | 00:00 | 3 | 99 | installed new processor computer |
| 71240802 | 2008 | 248 | 00:00 | 0 | 06 | replaced Optical Attenuation Mechanism |
| 71240802 | 2008 | 130 | 00:00 | 0 | 05 | saturable laser upgrade |
| 71240802 | 2008 | 105 | 00:00 | 3 | 99 | installed new controller computer |
| 71240801 | 2002 | 237 | 00:00 | 3 | 99 | installed final Laser Data Processing System v1.3 |
| 71240801 | 2002 | 034 | 00:00 | 3 | 99 | installed initial Laser Data Processing System v1.3 |
| 71240801 | 2002 | 023 | 00:00 | 0 | 05 | Laser Cavity Dump Upgrade |
| 71240801 | 2000 | 116 | 00:00 | 0 | 12 | upgrade meteorological sensor MET3 |
| 71240801 | 1999 | 168 | 00:00 | 0 | 10 | installed GPS steered Rubidium XL-DC, replacing Cesium |
| 71240801 | 1999 | 154 | 00:00 | 3 | 99 | new generic normal point software (v1.93) |
| 71240801 | 1999 | 127 | 00:00 | 0 | 10 | installed CNS clock, replacing GPS FTS receiver |
| 71240801 | 1999 | 057 | 00:00 | 3 | 99 | installed replacement HP computer |
| 71240801 | 1997 | 035 | 00:00 | 0 | 06 | completed high sensitivity receiver (phase 2) |
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