|
| EDG Data Set Name |
Granule Shortname |
| MODIS/Aqua Surface Reflectance Daily L2G Global 500m SIN Grid |
MYD09GHK |
| Version |
Acquisition Range |
Science Quality Status |
| V003 |
March 6 2003 (2003065) - February 1 2004 (2004032) |
Provisional |
| V004
|
July 4 2002 (2002185) |
Provisional |
Data Set Characteristics
Area = ~ 10° x 10° lat/long
Image Dimensions = 2 (2400x2400 row/column)
Average File Size = 126 MB
Resolution = 500 meters
Projection = Sinusoidal
Data Format = HDF-EOS
Science Data Sets (SDSs) = 10 |
 |
|
MYD09GHK - Daily 500m Surface Reflectance acquired February 15, 2004 over the Red Sea. |
Product Description
The MODIS Surface
Reflectance Daily L2G Global 500m SIN Grid product, MYD09GHK, is a seven-band
product computed from the MODIS Level 1B land bands 1-7. The product is an
estimate of the surface spectral reflectance for each band as it would have been
measured at ground level if there were no atmospheric scattering or absorption.
The correction scheme includes corrections for the effect of atmospheric gases,
aerosols, and thin cirrus clouds; it is applied to all Level 1B pixels that pass
the Level 1B quality control. The correction uses band 26 to detect cirrus
clouds, the approach used in MYD04 and MYD05 for water vapor, aerosol
correction, and NCEP for ozone; the best available climatology data are used if
the MODIS water vapor, aerosol, or ozone products are unavailable.
The Level 2G surface
reflectance product is the input for the generation of several land products:
8-day Surface Reflectance, Vegetation Indices (VIs), Bidirectional Reflectance
Distribution Function (BRDF), thermal anomaly, snow/ice, and Fraction of
Photosynthetically Active Radiation/Leaf Area Index (FPAR/LAI).
NOTE: These products are provisional, meaning that product quality may not be optimal. Incremental product improvements are still occurring, and users are urged to contact MODIS Science Team representatives prior to use of the data in publications. These data are likely to be replaced when the validated product becomes available.
| SDS |
Units |
Data Type |
Fill Value |
Valid Range |
Divide by
Scale Factor |
| 500m Surface Reflectance Band 1 (620-670 nm) |
Reflectance |
16-bit signed integer |
-28672 |
-100 - 16000 |
10000 |
| 500m Surface Reflectance Band 2 (841-876 nm) |
Reflectance |
16-bit signed integer |
-28672 |
-100 - 16000 |
10000 |
| 500m Surface Reflectance Band 3 (459-479 nm) |
Reflectance |
16-bit signed integer |
-28672 |
-100 - 16000 |
10000 |
| 500m Surface Reflectance Band 4 (545-565 nm) |
Reflectance |
16-bit signed integer |
-28672 |
-100 - 16000 |
10000 |
| 500m Surface Reflectance Band 5 (1230-1250 nm) |
Reflectance |
16-bit signed integer |
-28672 |
-100 - 16000 |
10000 |
| 500m Surface Reflectance Band 6 (1628-1652 nm) |
Reflectance |
16-bit signed integer |
-28672 |
-100 - 16000 |
10000 |
| 500m Surface Reflectance Band 7 (2105-2155 nm) |
Reflectance |
16-bit signed integer |
-28672 |
-100 - 16000 |
10000 |
| *500m Reflectance Band Quality |
Bit field |
32-bit unsigned integer |
787410671 |
0 - 4294967296 |
na |
| Orbit and coverage |
Bit field |
8-bit unsigned integer |
15 |
0 - 255 |
na |
| Number of Observations |
na |
8-bit signed integer |
-1 |
0 - 127 |
na |
*Quality Control Bit Index:
Bits are numbered from LSB (right) to MSB (left)
| 0-1 MODLAND QA bits; |
corrected product produced at
00 -- ideal quality all bands
01 -- less than ideal quality some or all bands
corrected product not produced due to
10 -- cloud effects all bands
11 -- other reasons some or all bands may be fill value
[Note that a value of (11) overrides a value of (01)].
|
| 2-5 |
band 1 data quality, four bit range;
0 = highest quality
8 = dead detector; data interpolated in L1B
9 = solar zenith >= 86 degrees
10 = solar zenith >= 85 and > 86 degrees
11 = missing input
12 = internal constant used in place of climatological data for at least one atmospheric constant
13 = correction out of bounds, pixel constrained to extreme allowable value
14 = L1B data faulty
15 = not processed due to deep ocean or clouds
|
| 6-9 |
band 2 data quality, four bit range;
SAME AS ABOVE
|
| 10-13 |
band 3 data quality, four bit range;
SAME AS ABOVE
|
| 14-17 |
band 4 data quality, four bit range;
SAME AS ABOVE
|
| 18-21 |
band 5 data quality, four bit range;
SAME AS ABOVE
|
| 22-25 |
band 6 data quality, four bit range;
SAME AS ABOVE
|
| 26-29 |
band 7 data quality, four bit range;
SAME AS ABOVE
|
| 30 |
atmospheric correction performed;
1 -- yes
0 -- no
|
| 31 |
adjacency correction performed;
1 -- yes
0 -- no
|
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View .pdf version 
 Retrieve the MYD09GHKv4 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e0dps01u.ecs.nasa.gov:22000/OPS/drill?attrib=esdt&esdt;=MYD09GHK.4&group;=MOLA
Via FTP Directory: ftp://e0dps01u.ecs.nasa.gov/MOLA/MYD09GHK.004/
Order Data through the EOS Data Gateway
( http://edcimswww.cr.usgs.gov/pub/imswelcome/)
EOS Data Gateway Search Tips
| Source: |
Aqua |
| Sensor: |
MODIS |
| Dataset: |
MODIS/Aqua Surface Reflectance Daily L2G Global 500m SIN Grid |
| Spatial: |
HORIZONTALTILENUMBER Max/Min VERTICALTILENUMBER Max/Min |
| Geographic Extent: |
Type Lat/Long Range or Draw on Map |
| Temporal Extent: |
2003-03-06 to 2004-02-01 (V003); 2002-07-04 to present (V004) |
Product Information 
Contact Information
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