TM 55-1510-221-10
of time synchronizing the CHAALS receivers (signal
conditioners or SC’s) aboard the aircraft. A backup
for the GPS will be provided by the data link. The
resultant emitter reports will be sent to GR/CS by
CHAALS.
(2.) GPS (and INS) Involvement. The ac-
curate and timely navigation (position and velocity)
is provided by integrating an INS with a GPS, and
integrating both (through a series of intermediaries)
with a CHAALS ground based navigation processor
(NP). The SC, data link, and CHAALS HSSP (High
Speed Signal Processor) from the communication
link. The critical airborne interfaces for CHAALS
navigation and time synchronization include the fol-
lowing:
1.
INS to GPS:
a.
Acceleration
b. Velocity
c.
Position
d. Altitude
2.
INS to CHAALS: Same as INS to GPS
3. GPS to CHAALS:
a.
b.
c.
d.
e.
Time mark pulse (time synchroniza,
tion)
Navigation data block (position, veloci
ty, and time)
Error state vector data block (9 ele-
ment ESV, time)
TM/covariance data block (time, TM
time, covariance)
Status data block (status including
DOP’s and FOMN)
3-76F
Change 2
