Skip to main content
About EOL
EOL Mission
EOL Organizational Structure
EOL Management
Join EOL Team
Contact EOL
Facilities & Instruments
Research Aircraft
Ground & Airborne Remote Sensing Platforms
Surface, Sounding & Profiling Systems
Aircraft Instrumentation
LAOF Guidebook
Data & Software
Data & Field Catalogs
Software Downloads
User Support
Request Facilities
Project Management Office
Design & Fabrication Services
Calibration Laboratory
ARISTO
Education & Outreach
Field Projects
Current & Upcoming Deployments
All Projects & Deployments
People
EOL Staff Directory
EOL Research Publications
EOL Patents
EOL Scientists
EOL Staff Awards
News & Events
EOL Seminar Series
Conferences
Workshops
EOL in the News
For Staff
Log In
CWIG Help Requests
EOL Internal Website
Gmail
UCAR Time Card
Maintenance
Earth Observing Laboratory
Search form
Search
Short Name or Variable Name:
radar altimeter
HAIS Instrument:
No
Manufacturer or Builder:
Stewart-Warner Electronics Div.
TABS
Description
Model:
RT-1438/APN-232(V) CARA
Measurements Provided:
Geometric (Radar) Altitude above the underlying surface (HGM232)
General Description:
The Altitude Radar is a FM CW system that determine altitude from zero to 50,000 feet. The output of the transmitter is a swept CW frequency from 4.24 GHz to 4.36 GHz or 4.3 GHz +/- 60 MHz. The Maximum power output of the transmitter is 1 watt, Track power of the antenna is attenuated or adjusted to 10dB above receiver noise.
The CARA system covers an altitude of 0 to 50,000 feet which is broken into seven segments as listed below.
*Segment Altitude Sweep Time(m/sec)
*0 0-1000 0.396
*1 1000-2000 0.791
*2 2000-4000 1.582
*3 4000-8000 3.164
*4 8000-16000 6.348
*5 16000-32000 12.657
*6 32000-50000 25.319
Precision: Analog +/- 2 ft, +/- 2%
Operating angle 65% bank, 45 Deg Pitch
Frequency 4.3 GHz
Type of Transmission fmcw
Temperature Range -55 Deg C to +71 Deg C
Measurement Characteristics:
see General Description
Contacts
Lead Contact:
Kurt Zrubek
Status/Plans
Current Location:
C-130
Operational Status:
still under development and not requestable
Serial Numbers
Property Tag and/or Serial Number:
S/N 9197 PPE ?, S/N 4431 PPE11410
Radar Altimeter
Radar Altimeter
Documentation
Organizational Facilities
Research Aviation Facility (RAF)
Log In