This discussion area will be used for communications between RS7 conferees and members of the team performing Rapid AI&T.
The team is assembling the spacecraft in an orderly and structured process. Every step has been meticulously documented.
All panels are attached quickly…
The team is ready for the first bus functional test, only 91 minutes from receiving direction from RS7.
Following the successful bus functional test, assembly resumes.
The team closes the panels…
Three hours from the RS7 order, the assembly is nearly complete.
All panels are closed, as of 4:16 MDT.
The second bus functional test began at 4:49 MDT.
Unpacking the solar array:
Illuminating the sensors for a test:
Attaching solar array at 5:23 MDT:
For those familiar with the “Four Hour Video,” today’s activity was even more impressive. The team not only assembled the spacecraft, but also performed two series of bus functional tests to provide assurance that the systems were operating correctly. The entire elapsed time for today’s activity was 4 hours, 52 minutes. This included 1 hour 34 minutes of functional testing.
Wednesday morning, 29 April 2009, the team will receive more guidance from RS7 regarding the limited series of tests to perform.
Following direction from the RS7 Conference, the team begins a series of tests on Wednesday morning.
Team members move the satellite to the vibration table.
The team members carefully install the satellite on the vibe table.
Vibration testing is underway at 10:38 MDT.
Following successful vibration tests, the team has moved the satellite back into the workspace, and prepares for the next functional tests.
The team removed the solar array and deployed it, then illuminated it to simulate sunlight.
Following more functional tests, the team began putting the satellite through simulated mission scenarios.
Here is a summary of the Day 2 activity:
1. Prepare for vibration testing, remove GSE items and configure for flight.
2. Weigh spacecraft and verify with predicted mass.
3. Perform sine sweep test in lateral axis. Verify first structural mode at 68Hz.
4. Perform random vibration, ESPA level -6dB, 1 min.
5. Perform sine sweep test in lateral axis. Verify first structural mode at 68Hz.
6. Configure GSE for functional test.
7. Perform Bus functional, ADCS command and telemetry, EPS battery charging, GPS signal reception.
8. TT&C uplink and downlink to simulated Kwaj Ground Station by RF over air.
9. Tactical radio link uplink and downlink to PRC-117 radio by RF over air.
10. Solar array deployment of the restraining panels.
11. Unfold and FITS array and illuminate. Verify open circuit voltage and limited current to spacecraft bus.
12. Stow FITS array and re-install.
13. Update spacecraft on-board flight software task list to include all mission software.
14. Power-up vehicle with simulation (SDT) and begin Launch/Early Orbit mission simulation.
15. Verify mission events: rate damping, array deployment, sun point, low drag attitude at low altitude, schedule and execute first TT&C contact and verify acquisition of S-Band downlink at ground station, simulate battery charge control with simulator supplying solar array power.
16. Power-down after one orbit (90 minutes).
Wednesday, 30 April 2009 at 7:00 MDT, Dale Stottlemyer applies blankets to the satellite while mission scenario simulations continue to run.
After all tests have successfully completed, the team packs the satellite for shipment.