Instrument

The parameter specifications of AMR are described in Table 1 for H-polarization observation. AMR is flown on a Beechcraft-B200 aircraft owned by Nakanihon Air Service Co., Ltd. under contract to NASDA/RESTEC (Remote Sensing Technology Center of Japan).
 

Table 1. AMR Parameter Specifications

Antenna	Line profiler with fixed horn antennas
Incidence angle (degree)	0, 11, or 55 (fixed during flight)
Delta T (K)	<0.2 to 0.4 (depending on frequency)
Polarization	Vertical and horizontal for all channels
Receiver	Dicke switching receiver
A/D	12 bits
Integration time	1.33 sec.
Instrument mass	approx. 600 kg
Instrument power	approx. 5 kW

 

Center frequencies (GHz)	6.925	10.65	18.7	23.8	36.5	89.0
Bandwidth (MHz)	350	100	200	400	1000	3000
Beamwidth El. (3dB in deg.)	12.3	10.0	8.9	6.3	7.2	7.2
Beamwidth Az. (3dB in deg.)	10.7	8.6	6.5	5.4	6.2	6.2

 
The Effective Field of view for each frequency band is shown in Table 2 for a case of 55 degrees incidence angle, three typical altitudes and flight speeds.

Table 2. Typical Size of Effective FOV

Center Frequency (GHz)	6.925	10.65	18.7	23.8	36.5	89.0
Altitude=8,000 m
Typical flight speed=115 m/sec
Effective FOV (km) El.	5.52	4.48	3.54	2.85	3.24	3.24
Effective FOV (km) Az.	2.61	2.1	1.58	1.32	1.51	1.51
Altitude=3,000 m
Typical flight speed=90 m/sec
Effective FOV (km) El.	2.13	1.74	1.39	1.13	1.28	1.28
Effective FOV (km) Az.	0.98	0.79	0.59	0.49	0.57	0.57
Altitude=500 m
Typical flight speed=80 m/sec
Effective FOV (km) El.	0.44	0.38	0.32	0.27	0.3	0.3
Effective FOV (km) Az.	0.16	0.13	0.1	0.08	0.09	0.09

 
AMR observation concept

Several photographs are shown below.

 
AMR High frequency compoment

 
Beechcraft B200