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Micro-Wave Temperature Sounder-II (MWTS-II)

Description

The MWTS-II instrument is a self-calibrating total-power passive microwave radiometer which has been manufactured by the Xi'an department of the China Aerospace Science and Technology Corporation.

The MWTS-II is a cross-track scanner and executes one complete revolution every 8/3 second period. During every revolution, the MWTS-II scans 90 Earth Field of Views (FOVs) with nadir resolution of 33 km.

The MWTS-II measures the Earth’s radiation at 13 channels with frequencies between 50～60GHz, which is used for temperature sounding from the surface to about 6 hPa.

The MWTS-II are capable of penetrating into the precipitating cloud so as to provide all-weather temperature profile information, which are very important for numerical weather forecast, disaster monitoring, and climate changes.

Satellite	FY-3C , FY-3D , FY-3F
No. Channels	13
Spatial Resolution	32km

Characteristics

No.	Centre Frequency (GHz)	Band width (MHz)	Polarization	Dynamic range (K)	NEΔT (K)	Calibration accuracy (K)	Antenna main beam efficiency
1	50.3	180	QH	3~340	1.5	1.5	>90%
2	51.76	400	QH	3~340	0.9	1.5	>90%
3	52.8	400	QH	3~340	0.9	1.5	>90%
4	53.596	400	QH	3~340	0.9	1.5	>90%
5	54.40	400	QH	3~340	0.9	1.5	>90%
6	54.94	400	QH	3~340	0.9	1.5	>90%
7	55.50	330	QH	3~340	0.9	1.5	>90%
8	57.290344(fo)	330	QH	3~340	0.9	1.5	>90%
9	fo±0.217	78	QH	3~340	1.5	1.5	>90%
10	fo±0.3222±0.048	36	QH	3~340	1.5	1.5	>90%
11	fo±0.3222±0.022	16	QH	3~340	2.3	1.5	>90%
12	fo±0.3222±0.010	8	QH	3~340	3.0	1.5	>90%
13	fo±0.3222±0.0045	3	QH	3~340	4.5	1.5	>90%

Data and Products

Satellite	Instrument	Datasets
FY-3D	MWTS-II	L1 data,  L2L3 product
FY-3C	MWTS-II	L1 data

Calibration and Validation

MWTS-II calibration and validation