|
| EDG Data Set Name |
Granule Shortname |
| MODIS/Terra Observation Pointers Daily L2G Global 1km SIN Grid Day |
MODPT1KD |
| Version |
Acquisition Range |
Science Quality Status |
| V003 |
August 29, 2002 (2002241) - October 7, 2002 (2002280) |
Provisional as of Nov 1, 2000 |
| V004 |
February 24, 2000 (2000055) - present |
Validated Stage 1 |
|
Data Set Characteristics
Area = ~ 10° x 10° lat/long
Image Dimensions = 2 (1200x1200 row/column)
Average File Size = 16 MB
Resolution = 1 kilometer
Projection = Sinusoidal
Processing Level = 2G
Data Format = HDF-EOS
Science Data Sets (SDSs) = 5
|
| Color |
Observation Coverage |
| Violet |
0 to 10% |
| Sienna |
11 to 20% |
| Purple |
21 to 30% |
| Maroon |
31 to 40% |
| Magenta |
41 to 50% |
| Cyan |
51 to 60% |
| Yellow |
61 to 70% |
| Blue |
71 to 80% |
| Green |
81 to 90% |
| Red |
91 to 100% |
| Color |
Granule Pointers |
| Red |
1 |
| Blue |
2 |
| Cyan |
0 |
| Black |
255 |
|
 |
Product Description
The MODIS Level 2 Gridded (L2G) land data storage methodology was developed to
satisfy the diverse needs of the MODIS land product generation algorithms, to
enable efficient processing and reprocessing of MODIS land products, to
facilitate the development of terrestrial remote sensing algorithms and science
using MODIS land data, and to provide users with the original sensed MODIS
observations and their sub-pixel geolocation information.
The L2G data structure
stores information concerning the Level 2 (L2) observations that fall within
each Level 3 (L3) grid cell over a 24 hour (GMT) period. The measured L2
geophysical parameter and the sensing geometry information are stored for each
observation. The observation coverage, the area of the intersection of the
observation and each overlapping grid cell in the tile, is computed and stored
in the MODPT1KD product. The original 1-km L2 product line and sample numbers of
each observation are also stored. The images displayed represent day-mode L2G information acquired over the western coast of North America on June 9, 2000. The first image is of the
observation coverage and the second contains the granule pointer, a pointer to
the granule from which each observation was obtained. The observations stored in
the L2G products are examined by the L3 processes to help extract the most
relevant observations falling over each grid cell.
NOTE:
The later versions of these products are validated, meaning that product
uncertainties are well defined over a range of representative conditions. Although there may be later improved versions, these data are ready for use in scientific publications.
| SDS |
Units |
Data Type -bit |
Fill
Value |
Valid
Range |
Multiply By
Scaling Factor |
Calibrated
_nt |
| Number of Observations |
na |
8-bit signed integer |
-1 |
0 - 127 |
na |
na |
| Observation coverage |
% |
8-bit signed integer |
-1 |
0 - 100 |
0.01 |
5 |
| Granule pointer |
na |
8-bit unsigned integer |
255 |
0 - 254 |
na |
na |
| Observation line number |
na |
16-bit unsigned integer |
65535 |
0 - 1199 |
na |
na |
| Observation sample number |
na |
16-bit unsigned integer |
65535 |
0 - 1199 |
na |
na |
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( http://edcimswww.cr.usgs.gov/pub/imswelcome/)
EOS Data Gateway Search Tips
| Data Center: |
LPDAAC |
| Sensor: |
MODIS |
| Dataset: |
MODIS/Terra Observation Pointers Daily L2G Global 1km SIN Grid Day |
| Spatial |
HORIZONTALTILENUMBER Max/Min VERTICALTILENUMBER Max/Min |
| Geographic Extent: |
Type Lat/Long Range or Draw on Map |
| Temporal Extent: |
2000-02-24 to present |
Product Information
Contact Information
|
