|
File Format
The MISR regional products are in HDF-EOS format. Tools and other
information about HDF-EOS are available from the
Hierarchial Data Format page.
Detailed information about the format of the MISR Regional files can be
found in the Data Products
Specifications document. However, if you are using a HDF-EOS aware tool
(e.g., IDL, HDF-EOS library), you will need to know little more than the
HDF-EOS grid and HDF-EOS field names.
Note that the MISR Regional data are map projected as described on the
Map Projection page.
Brief Regional Product Descriptions (See
Data Products Specifications
for complete details.)
Component Global Georectified
Radiance Product (CGGRP):
MI3DRDR, MI3MRDR, MI3QRDR |
|---|
| Grid |
Field |
Data type |
Description |
| GeorectifiedRadianceAverage |
Average |
FLOAT32
-9999 = fill |
Average radiance value, in W m-2 sr-1
µm-1. Indexed by y, x, camera, band.
Camera has 0 = DF, 1 = CF, 2 = BF, 3 = AF, 4 = AN, 5 = AA, 6 = BA, 7 =
CA, 8 = DA.
Band is 0 = Blue (443 nm), 1 = Green (555 nm), 2 = Red (670 nm), 3 =
Infrared (865 nm).
|
| Average count | INT32 |
Count of radiances used in the Average field. Same indices as Average. |
| GeorectifiedRadianceCovariance |
Covariance |
FLOAT32
0 = fill |
Variance and covariance between the radiances, in the units
W2 m-4 sr-2 µm-2.
Contains only the lower triangular part of the symmetric covariance matrix.
Indexed by x, y, and a covariance index.
For the covariance index, 0 = Variance of the DF Blue, 1 = Covariance of the DF
Blue and DF Green, 2 = Variance of DF Green, and so on. |
| Covariance count |
INT32 |
Count of the radiance pairs that are used in the Covariance. Same indices
as Covariance. |
Component Global Aerosol
Product (CGAS):
MI3DAER, MI3MAER, MI3QAER |
|---|
| Grid |
Field |
Data type |
Description |
| AerosolParameterAverage |
Optical depth average |
FLOAT32
-9999 = fill |
Average of the aerosol optical depth. Green (555 nm) band. Indexed by y,
x. |
| Optical depth average count |
INT32 |
Count of optical depths used in the Optical depth average. |
Component Global Land Surface
Product (CGLS):
MI3DLSR, MI3MLSR, MI3QLSR |
|---|
| Grid |
Field |
Data type |
Description |
| LandParameterAverage |
DHR average |
FLOAT32
-9999 = fill |
Average of DHR (Directional Hemispheric Reflectance). Defined as radiance
exitance divided by irradiance under illumination from a single direction.
Also known as the "black sky" albedo. Indexed by y, x, and band.
Band is 0 = Blue (443 nm), 1 = Green (555 nm), 2 = Red (670 nm), 3 =
Infrared (865 nm). |
| DHR average count |
INT32 |
Count of DHR values used in DHR average. Same indices as DHR average. |
| DHRPAR average |
FLOAT32
-9999 = fill |
Average of DHR integrated over the Photosynthetically Active Radiation
(PAR) band. |
| DHRPAR average count |
INT32 |
Count of DHRPAR values used in DHRPAR average. Same indices as DHRPAR
average. |
| DHR Shortwave approximation average |
FLOAT32
-9999 = fill |
Average of DHR for a broad shortwave band (400 - 2500 nm), approximated
from visible bands. Indexed by y, x. |
| DHR Shortwave approximation average count |
INT32 |
Count of DHR Shortwave approximation values used in DHR Shortwave
approximation average. Same indices as DHR Shortwave approximation average. |
| FPAR average |
FLOAT32
-9999 = fill |
Average of Fractional absorbed Photosynthetically Active Radiation (FPAR).
Defined as PAR irradiance absorbed by live vegetation divided by incident PAR
irradiance. Indexed by y, x. |
| FPAR average count |
INT32 |
Count of FPAR values used in FPAR average. Same indices as FPAR average. |
| LAI average |
FLOAT32
-9999 = fill |
Average of Leaf Area Index (LAI). Indexed by y, x. |
| LAI average count |
INT32 |
Count of LAI values used in LAI average. Same indices as LAI average. |
| NDVI average |
FLOAT32
-9999 = fill |
Average of Normalized Difference Vegetation Index (NDVI). Indexed by y, x. |
| NDVI average count |
INT32 |
Count of NDVI values used in NDVI average. Same indices as NDVI average. |
|
