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Station History Log - Tahiti, French Polynesia (7124)

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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