| SOD | Year | Day of Year |
Time of Day |
Data Impact | System | Description |
|---|---|---|---|---|---|---|
| 72371901 | 2024 | 028 | 00:00 | 2 | 10.01 | Preprocessing criterion changed for LARES-1, -2, Starlette and Stella |
| 72371901 | 2023 | 354 | 00:00 | 2 | 10.01 | Preprocessing criterion changed for LAGEOS-1 and -2 |
| 72371901 | 2023 | 311 | 18:15 | 2 | 05 | Station maintenance finished: Operation resumed. |
| 72371901 | 2023 | 289 | 00:00 | 2 | 05 | Station shut down for maintenance: Laser chamber replacement. |
| 72371901 | 2021 | 349 | 06:40 | 2 | 10.01 | Updated NP generating software. NP bin kurtosis algorithm now has 3.0 subtracted. |
| 72371901 | 2021 | 239 | 18:00 | 2 | 5.05 | Use PI laser instead of Daheng laser. |
| 72371901 | 2021 | 168 | 16:30 | 2 | 5.04 | Adjusted TC454 CFD trigger(T) and zero(Z) voltage, revert to last state before 2021-006. Calibration delay affected. |
| 72371901 | 2021 | 006 | 08:00 | 2 | 5.04 | Adjusted TC454 CFD trigger(T) and zero(Z) voltage. Calibration delay affected. |
| 72371901 | 2018 | 100 | 06:00 | 2 | 06.01 | Use A033 event timer instead of A032 event timer. |
| 72371901 | 2018 | 080 | 07:00 | 2 | 05 | Use the former laser instead of new laser. |
| 72371901 | 2017 | 338 | 09:20 | 2 | 06.01 | New A032 event timer instead of old A032 event timer. |
| 72371901 | 2017 | 328 | 09:20 | 2 | 06.01 | Use A032 event timer instead of A033 event timer. |
| 72371901 | 2017 | 284 | 00:00 | 2 | 06.01 | Use A033 event timer instead of A032 event timer. |
| 72371901 | 2017 | 244 | 00:00 | 2 | 06.01 | Use A032 event timer instead of A033 event timer. |
| 72371901 | 2017 | 228 | 00:00 | 2 | 05 | Use a new laser for test instead of former laser. |
| 72371901 | 2017 | 128 | 02:00 | 2 | 06.01 | Use A033 event timer instead of A032 event timer. |
| 72371901 | 2016 | 319 | 08:30 | 2 | 99 | Control software was modified. |
| 72371901 | 2015 | 285 | 08:30 | 2 | 13.01 | New GPS timer ASHTECH UZ-12 was juxtaposed beside the Meridian Precision GPS TimeBase clock. |
| 72371901 | 2015 | 285 | 08:30 | 2 | 13.02 | Coordinate measurement result added. |
| 72371901 | 2015 | 145 | 08:30 | 2 | 99 | Change new return cable. |
| 72371901 | 2015 | 140 | 02:38 | 2 | 06.01 | Remove A033 event timer and pulse distribution unit. Using A032 event timer. |
| 72371901 | 2013 | 225 | 00:00 | 2 | 09 | Change new Meridian Precision GPS TimeBase clock. |
| 72371901 | 2013 | 225 | 00:00 | 2 | 99 | Change new return cable. |
| 72371901 | 2013 | 115 | 00:00 | 2 | 08 | Test the new near target.The target distance is 3.699m. |
| 72371901 | 2012 | 116 | 00:00 | 2 | 06.01 | Test the new A033 enent timer and pulse distribution unit |
| 72371901 | 2011 | 234 | 00:00 | 2 | 99 | The start and stop cables are changed |
| 72371901 | 2010 | 271 | 00:00 | 2 | 99 | the threshold of the third channel of TC454 is adjusted |
| 72371901 | 2009 | 253 | 00:00 | 2 | 99 | The last channel of TC454 is replaced by the third one,which is used for the input B of event timer A032-ET |
| 72371901 | 2009 | 202 | 00:00 | 2 | 05 | new laser system |
| 72371901 | 2008 | 146 | 00:00 | 2 | 99 | New computer, new controlling hardware and software |
| 72371901 | 2006 | 319 | 00:00 | 2 | 99 | start and stop cables are changed |
| 72371901 | 2006 | 296 | 00:00 | 2 | 99 | New controlling card and software,A032 event timer is used |
| 72371901 | 2006 | 296 | 00:00 | 2 | 06.01 | A032 event timer is used |
| 72371901 | 2006 | 182 | 00:00 | 2 | 04 | New servo and encoder,24-bit encoder and digital servo |
| 72371901 | 2006 | 154 | 00:00 | 2 | 99 | The system is re-adjusted,all mirrors are re-coated. |
| 72371901 | 2006 | 096 | 00:00 | 2 | 99 | Software modified for CPF |
| 72371901 | 2005 | 308 | 00:00 | 2 | 99 | Software modified for timing system and cables of the start and stop signal of HP5370B changed |
| 72371901 | 2005 | 292 | 00:00 | 2 | 99 | The first channel of TC454 is connected to start of HP5370B directly,the second channel removed |
| 72371901 | 2005 | 290 | 00:00 | 2 | 99 | All Cable replaced |
| 72371901 | 2005 | 275 | 00:00 | 2 | 99 | The Second channel of TC454 is used for start of HP5370B |
| 72371901 | 2002 | 195 | 00:00 | 2 | 06.01 | New HP5370B replaced the old one |
| 72371901 | 2002 | 176 | 00:00 | 2 | 99 | New computer and software replaced the old one |
| 72371901 | 2002 | 119 | 00:00 | 2 | 09 | HP58503A GPS receiver is repaired, |
| 72371901 | 2002 | 119 | 00:00 | 2 | 09 | HP58503A GPS time and frequency reference receiver replaced XR4-GPS and Rebidium frequency standard |
| 72371901 | 2002 | 079 | 00:00 | 2 | 09 | HP58503A GPS receiver is replaced,HP58503A GPS receiver was broken |
| 72371901 | 2001 | 290 | 00:00 | 2 | 06.01 | New C-SPAD replaced the old one, output: out1 |
| 72371901 | 2001 | 156 | 00:00 | 2 | 06.01 | C-SPAD out2 replaced out1 |
| 72371901 | 2000 | 070 | 00:00 | 2 | 99 | returning signal cable changed |
| 72371901 | 1999 | 255 | 00:00 | 2 | 06.01 | C-SPAD out1 replaced out2, returning signal cable changed |
| 72371901 | 1999 | 255 | 00:00 | 2 | 99 | returning signal cable changed |
| 72371901 | 1999 | 254 | 00:00 | 2 | 06.01 | C-SPAD out2 replaced out1 |
| 72371901 | 1999 | 245 | 00:00 | 2 | 99 | the system cable changed |
| 72371901 | 1999 | 152 | 00:00 | 2 | 04 | New encoder for tracking system,23-bit encoder and new code disk |
| 72371901 | 1998 | 034 | 00:00 | 2 | 04 | New driving system for mount |
| 72371901 | 1997 | 230 | 00:00 | 2 | 06.01 | C-SPAD detector installedand |
| 72371901 | 1997 | 230 | 00:00 | 2 | 99 | PCS installed |
| 72371901 | 1997 | 230 | 00:00 | 2 | 12 | METS installed and new survey |
| 72371901 | 1997 | 230 | 00:00 | 2 | 09 | New GPS receiver replaced XR4-GPS |
| 72371901 | 1997 | 214 | 00:00 | 2 | 99 | repaired preamplifier used and short cable from PMT to preamplifier |
| 72371901 | 1995 | 001 | 00:00 | 2 | 99 | CCD camera installed |
| 72371901 | 1994 | 001 | 00:00 | 2 | 99 | preamplifier installed |
| 72371901 | 1993 | 089 | 00:00 | 2 | 09 | GPS receiver installed |
| 72371901 | 1993 | 089 | 00:00 | 2 | 99 | TC454 replaced 1428A |
| 72371901 | 1992 | 001 | 00:00 | 2 | 06.01 | Baseline system configuration:GDB49A detector(PMT) |
| 72371901 | 1992 | 001 | 00:00 | 2 | 06.01 | Baseline system configuration:HP5370B counter |
| 72371901 | 1992 | 001 | 00:00 | 2 | 05 | Baseline system configuration:ND:YAD laser |
| 72371901 | 1992 | 001 | 00:00 | 2 | 99 | Baseline system configuration:1428A constant fraction discriminator |
| 72371901 | 1992 | 001 | 00:00 | 2 | 04 | Baseline system configuration:Az-El mount |
| 72371901 | 1992 | 001 | 00:00 | 2 | 09.01 | Baseline system configuration:Rebidium frequency standard |
| 72371901 | 1992 | 001 | 00:00 | 2 | 99 | Baseline system configuration:Long wave receiver |
| 72371901 | 1992 | 001 | 00:00 | 2 | 99 | Baseline system configuration:4013B camera |
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