Instrument Abbreviation:
GLAT, GLON, GALT, GVEW, GVNS, GMODE, GSTAT
Instrument Measurements:
a) Trace Gas
b) Cloud Physics/Aerosol
c) Radiation/Optical/Electrical
d) Additional Capabilities
Time of day
Aircraft 3-dimensional position
Aircraft 2-dimensional ground speed
Resource Person/Developer:
Name: Dick Friesen
Affiliation: NCAR/ATD/RAF
Phone: (303) 497-1047
Email: rbf@ucar.edu
Principle of Measurement:
The TANS-III has multichannel receivers to simultaneously track several of the
24 GPS satellites (managed by the U.S. Department of Defense), at least four
of which should be above the horizon at all times. Aircraft position and
ground speeds are calculated by the TANS-III using the ephemeris and clock
data from this dynamically-changing, available array of satellites.
In situ/Remote/Flux Measurement:
Remote
Field projects in which the instrument has been used:
most
Aircraft Platform:
all
Inlet Configuration/Location:
fuselage-mounted antenna
Calibration/Cross Calibration:
Operator Requirements:
Data Collection:
external
Post-flight Data Validation, Processing, Hours per Flight Hour etc.
RAF NIMBUS software processor
Post-project validation by RAF Project Manager
Physical Characteristics:
Dimensions:
Weight:
Power:
Other:
Response Time:
1 measurement per second
Detection Limits:
< = 0.5 m
< = 0.05 m/s
Accuracy:
Precision:
Limitations (such as altitude, airspeed, etc.)