The Humidity Sounder for Brazil (HSB), a 4-channel microwave sounder provided by Brazil aimed at obtaining humidity profiles throughout the atmosphere. The HSB is the instrument in the AIRS/AMSU-A/HSB triplet that allows humidity measurements even under conditions of heavy cloudiness and haze. The HSB provided high quality data until February 2003.
- Multi-channel passive radiometer for humidity profiling, consisting of four channels: 1 at 150 GHz, 3 at 183 GHz .
- Provides atmospheric water vapor profile measurements.
- Responsible Agency: Brazilian National Institute for Space Studies.
| Heritage |
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Advacned Microwave Sounding Unit-B (AMSU-B) |
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| Swath |
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1650 km |
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| Spatial Resolution |
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13.5 km horizontal at nadir |
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| Mass |
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66 kg |
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| Duty Cycle |
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100% |
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| Power |
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85 W (average), 154 W (peak) |
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| Data Rate |
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4.2 kbps |
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| Thermal Control By |
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Radiator |
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| Thermal Operating Range |
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0-40° C |
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| Field of View (FOV) |
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±49.5° cross track from nadir (+90° to -49.5° for calibration) |
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| Instrument Instantaneous FOV |
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1.1° |
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| Pointing Requirements (platform + instrument, 3σ) |
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| Control |
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3600 arcsec |
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| Knowledge |
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360 arcsec |
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| Stability |
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74 arcsec/sec |
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| Jitter |
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TBD |
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| Physical Size |
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73 x 69 x 47 cm |
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 "HSB Scans Brazil"
On Aqua, it is particularly important to obtain humidities under overcast conditions. This artist's concept animation shows the HSB instrument measuring humidities at four levels in the atmosphere, each level indicated by a separate color. | |
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