9 July 2019: Lightsail 2 Mission Manager's Log
On July 9, the flight team developed and tested flight software updates related to the attitude determination and control subsystem, as summarized in the table below. The team is working toward completion of testing of all software updates for version 7, and will begin the uplink process this evening. Uplink of the full software patch is expected to take approximately two days. These changes address all of the critical anomalies that have been observed to date for ADCS modes 0 (detumble) and 1 (Z-axis alignment).
| Software Update | Tested on BenchSat? | Software Version |
|---|---|---|
| Fix torquer initialization error | Yes | v7 |
| Change to feed sun sensor angles to ADCS | Yes | v7 |
| Update sun vector calculation from sun sensor angles input | Yes | v7 |
| Change to sun sensor voting | v7 | |
| Addition of sun sensor voting to ADCS_Status | v7 | |
| Enable passive telemetry reporting for disabled ADCS sensors | Yes | v7 |
| Longitude encoding fix | Yes | v7 |
| Updated ADCS gains file to correct sun sensor and magnetometer coordinate transformation matrices | v7 | |
| ADCS algorithm eclipse check fix | No | v8 |
Mission operators continued to downlink stored telemetry and images. A new two-line element (TLE) was uplinked to the spacecraft.
Today, the team will complete the testing of all software to be included in the v7 update, and will procede with uplinking the software patch.