T-45C TS, ADV & IUT ENG-24
GINA Operating Characteristics
2.
System will continue to function with less than a
four (4) satellite lock-on (can decrease to just one
[1] satellite lock-on), but only after a full GINA
alignment has been completed
NOTE: GPS (only) accuracy degrades as satellites
are lost.
3.
ACFT display page continually indicates the
number of GPS satellites locked-on by the aircraft
4.
When less than four (4) satellites are locked-on, the
INS automatically updates GPS data; no time limit
INSTRUCTOR NOTES
The GPS may lose contact with one or more navigation
satellites for a variety of reasons. That is most likely to occur
when the aircraft is banked, inverted, or another aircraft blocks
the signal, and when a new satellite array is being selected.
During those moments, the INS feeds velocity data to the GPS,
so that the GPS can continue to accurately calculate present
position. If satellite contact is completely lost for more than
65 seconds, the GINA will automatically switch to INS mode.
When that occurs, the HYBD and GPS legends on the ADI
display, may or may not disappear: If GPS data passes an
internal accuracy criteria check, those legends will remain; if
GPS data fails that accuracy test, those legends will be
removed.
E.
GPS antenna
Sg 4, fr 4
1.
Located atop aircraft behind canopy
2.
Installed on door 312CT
3.
Fixed radiation pattern, omni-directional
4.
Receives GPS satellite signals 360 degrees above
10 degree elevation from mount perspective
Original (9-98)
Page 24-23
Previous Page
