|
| EDG Data Set Name |
Granule Shortname |
MODIS/Terra Observation Pointers Daily L2G Global 500m SIN Grid |
MODPTHKM |
| 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 (2400x2400 row/column)
Average File Size = 82 MB
Resolution = 1 kilometer
Projection = Sinusoidal
Processing Level = 2G
Data Format = HDF-EOS
Science Data Sets (SDSs) = 7
|
| 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 |
0 |
| Yellow |
1 |
| Green |
2 |
| 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 observation
coverage, the area of the intersection of the observation and each overlapping
grid cell in the tile, is computed and stored. The above images 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 original 500-m L2 product line and sample numbers
of each observation are included. Offsets are provided to the corresponding observation in the coarser 1-km
L2G files (MODPT1KD, etc.) to allow 500-m and 250-m products to be generated
using information from the coarser resolutions. The observations stored in the
L2G products are
examined by the L3 processes to 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 |
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 - 2399 |
na |
na |
| Observation sample number |
na |
16-bit unsigned integer |
65535 |
0 - 2399 |
na |
na |
row and column offset in
coarser grid |
na |
8-bit unsigned integer |
136 |
0 - 255 |
na |
na |
observation number in
coarser grid |
na |
8-bit unsigned integer |
255 |
0 - 254 |
na |
na |
Print or save this information in .pdf format
View .pdf version 
 Retrieve the MODPTHKMv4 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e0dps01u.ecs.nasa.gov:22000/OPS/drill?attrib=esdt&esdt;=MODPTHKM.4&group;=MOLT
Via FTP Directory: ftp://e0dps01u.ecs.nasa.gov/MOLT/MODPTHKM.004/
Order Data through the EOS Data Gateway
( 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 500m SIN Grid |
| 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
|
