Cloud_Mask[Byte_Segment=0..0]
[Cell_Along_Swath_5km=0..405]
[Cell_Across_Swath_5km=0..270]
(Type is Int32)
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attributes
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coordinates
Byte_Segment Latitude Longitude
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long_name
MODIS Cloud Mask
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Cell_Along_Swath_Sampling
4
2029
5
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Cell_Across_Swath_Sampling
3
1348
5
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Geolocation_Pointer
External MODIS geolocation product
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description
\n
Bit fields within each byte are numbered from the left:
7, 6, 5, 4, 3, 2, 1, 0.
The left-most bit (bit 7) is the most significant bit.
The right-most bit (bit 0) is the least significant bit.
bit field Description Key
--------- ----------- ---
0 Cloud Mask Flag 0 = Not determined
1 = Determined
2, 1 Unobstructed FOV Quality Flag 00 = Cloudy
01 = Uncertain
10 = Probably Clear
11 = Confident Clear
PROCESSING PATH
---------------
3 Day or Night Path 0 = Night / 1 = Day
4 Sunglint Path 0 = Yes / 1 = No
5 Snow/Ice Background Path 0 = Yes / 1 = No
7, 6 Land or Water Path 00 = Water
01 = Coastal
10 = Desert
11 = Land
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_1_km_to_5_km_subsampling_description
Each value in this dataset does not represent an average of properties over a 5 x 5 km grid box, but rather a single sample from within each 5 km box. Normally, pixels in across-track rows 4 and 9 (counting in the direction of increasing scan number) out of every set of 10 rows are used for subsampling the 1 km retrievals to a 5 km resolution. If the array contents are determined to be all fill values after selecting the default pixel subset (e.g., from failed detectors), a different pair of pixel rows is used to perform the subsampling. Note that 5 km data sets are centered on rows 3 and 8; the default sampling choice of 4 and 9 is for better data quality and avoidance of dead detectors on Aqua. The row pair used for the 1 km sample is always given by the first number and last digit of the second number of the attribute Cell_Along_Swath_Sampling. The attribute Cell_Across_Swath_Sampling indicates that columns 3 and 8 are used, as they always are, for across-track sampling. Again these values are to be interpreted counting in the direction of the scan, from 1 through 10 inclusively. For example, if the value of attribute Cell_Along_Swath_Sampling is 3, 2028, 5, then the third and eighth pixel rows were used for subsampling. A value of 4, 2029, 5 indicates that the default fourth and ninth rows pair was used.
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source_info
MYD35_L2.A2015120.1535.061.2018049134112.hdf
pge03v6.1.1
Cloud_Mask
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scale_factor
1.0000000000000000
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add_offset
0.0000000000000000
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