Req. 5.3.4.1: "GPS Time Hack from SC"

The LAT shall receive and process a 1 Hz GPS "time hack" on a discrete signal line, generating a correlation between the GPS time hack and the LAT internal 20 MHz clock.

Basis (help)

[2] (3.2.5.2.1)

2: "LAT Instrument - Spacecraft Interface Requirements Doc." (NASA 433-IRD-0001)

3.2.5.2.1: "Pulse Per Second (PPS) Bus"

The SC shall provide to the LAT, across an LVDS interface, a 1PPS signal accurate to +/- 1.5 usec when GPS provides the timing signal.

Context (help)

Test(s)

005: Vehicle Signals Interface Verification

This test shall verify the timing and processing of all signals from the Spacecraft, as defined in the LAT-SC ICD [28].