AMSU-A2 channels
The Advanced Microwave Sounding Unit (AMSU-A2) consists of the lowest frequencies of the AMSU-A system (K band channel 1 and Ka band channel 2), and the associated scanning, calibration, processing, and power control hardware and circuitry.
At each channel frequency, the antenna beamwidth is a constant 3.33° ± 10% (circular, at half power point). Thirty contiguous resolution scenes are sampled in a stepped-scan fashion every eight seconds.
AMSU-A2 radiometer characteristics are illustrated in the table below:
| Centre frequency (MHz) | Bandwidth (MHz) | Centre frequency stability (MHz) | |
|---|---|---|---|
| 1 |
23800 (2 pass-band) |
270 | ± 10.0 |
| 2 |
31400 (2 pass-band) |
180 | ± 10.0 |
|
Temperature sensitivity NEDT (K) | Calibration Accuracy (K) | Polarization | -3 dB Stop Band (SB) fc ± SB (MHz) | |
|---|---|---|---|---|
| 1 | 0.3 | 2.0 | V | 10.0 |
| 2 | 0.3 | 2.0 | V | 10.0 |
V : Polarization vector is parallel to scan plane at nadir
