The major mission of CFOSAT (Chinese-French Oceanic Satellite) is to obtain the global sea surface wind, sea wave spectrum, and polar ice characteristics. CFOSAT could further strengthen the scientific understanding of the changing laws of marine dynamic environment, improve the accuracy and timelines of catastrophic sea conditions such as huge wave tropical storms and storm surges, and provide basic data for studying global climate change by obtaining polar ice sheet data.
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Level |
NAME |
Description |
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|
L1
standard product |
Scatterometer
backscatter coefficient product |
On
the basis of L0 data, perform calibration and positioning processing.
According to data such as orbit, attitude, scan angle, observation angle,
etc., generate geometric positioning data of footprints and strip observation
points. After noise calibration, internal calibration, and Doppler Signal
processing such as Doppler frequency offset correction generates backscatter
coefficient products. |
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|
Surface
Waves Investigation and Monitoring backscatter coefficient product |
On
the basis of level 0 data, calibration and positioning are performed.
According to data such as orbit, attitude, scan angle, the geometric
positioning data of the 6 fixed beams of the spectrometer are generated, and
the backscatter coefficients of the 6 beams are generated through signal
processing. |
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L2
standard product |
Scatterometer
wind field products along the track |
On
the basis of level 1 data, perform panel registration, backscatter
coefficient measurement variance estimation, atmospheric attenuation
correction, data quality check, wind vector inversion, ambiguous resolution
removal, sub-satellite point and wind vector unit in the swath edge area wind
direction optimization, rainfall identification and other processing to
generate wind field products along the orbit. swath：1050km wind
speed accuracy：±2m/s
or 10%（4~24m/s） wind
direction accuracy：±20° spatial
resolution：25km*25km/12.5km*12.5km |
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|
Surface
Waves Investigation and Monitoring Wave spectrum products along the track |
On
the basis of level 1 data, the sea, land and ice sea identification, rainfall
identification, wave spectrum inversion, etc. are processed to generate wave
spectrum products along the orbit, including sub-satellite spot beam products
and 2-10° beam products. Wave spectrum parameters include effective wave
height, wavelength and wave direction, etc. significant wave high accuracy： 10% of significant wave high or better than 0.5m; detectable wave length range：70-500m wave direction accuracy：15° wave height energy density spectrum accuracy：15%
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L3
standard product |
Scatterometer
global wind field products |
On
the basis of level 2 data, through standard grid processing, single-day ascending/descending
separation, rainfall detection and other processing, the production of daily,
3-day, 7-day, monthly, seasonal and annual global gridded sea surface wind
field products and thematic map are produced. |
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|
Surface
Waves Investigation and Monitoring Global Wave Products |
On
the basis of level 2 data, through projection transformation, single-day
ascending/descending separation, etc., the single-satellite production of
daily, 3-day, 7-day, monthly, quarterly and annual average global grid wave
parameter products and thematic map are produced. |
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|
L4
Fusion Products |
Multi-source
integration of global wind field products |
Integrate
various scatterometers and radiometer products of CFOSAT, HY2, foreign
satellites, and produce daily, weekly, monthly, quarterly, and annual global
sea surface wind field products and thematic maps, as well as North and South
pole sea surface wind fields and thematic maps |
|
|
Multi-source
integration of global effective wave height products |
The
CFOSAT wave spectrometer, HY2 and foreign satellites altimeter products are
fused to produce daily, weekly, monthly, quarterly, and annual global
effective wave height products and thematic maps. |
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