MODIS/Aqua Calibrated Radiances 1km 5-Min 1B Wide Swath Subset along CloudSat V2 (MAC021S1) at GES DISCEntry ID: GES_DISC_MAC021S1_v2
Abstract: This is the wide-swath MODIS/Aqua subset along CloudSat field of view track. The goal of the wide-swath subset is to select and return MODIS data that are within +-100 km across the CloudSat track. I.e. the resultant MODIS subset swath is about 200 km cross-track. Thus, MAC021S1 cross-track width is 201 pixels for radiances. Geolocations in the original product, however, are subsampled at 5-km, ... and thus the cross-track width of the subset geolocations is 41 pixels. Along-track, all MODIS pixels from the original product are preserved.
In the standard product, the MODIS Level 1B data set contains calibrated and geolocated at-aperture radiances for 36 discrete bands located in the 0.4 to 14.4 micron region of electromagentic spectrum. These data are generated from the MODIS Level 1A scans of raw radiance and in the process converted to geophysical units of W/(m^2 um sr). In addition, the Earth Bi-directional Reflectance Distribution Function (BRDF) may be determined for the solar reflective bands (1-19, 26) through knowledge of the solar irradiance (e.g., determined from MODIS solar diffuser data, and from the target illumination geometry). Additional data are provided including quality flags, error estimates and calibration data.
Visible, shortwave infrared, and near infrared measurements are only made during the daytime, while radiances for the thermal infrared region (bands 20-25, 27-36) are measured continuously.
Temporal_Resolution: "Two day repeat observations with a repeat orbit pattern every 16 days. The locales where the ascending and descending modes are close or intersect can have two observations per day."
(The shortname for this product is MAC021S1). For more data set information: See the A-Train Data Depot homepage: http://disc.sci.gsfc.nasa.gov/atdd/ See the MODIS Science Team homepage: http://modis.gsfc.nasa.gov/data/dataprod/
Data Set Citation
Dataset Originator/Creator: GES DISC/MODIS
Dataset Title: MODIS/Aqua Calibrated Radiances 1km 5-Min 1B Wide Swath Subset along CloudSat
Dataset Release Date: October 2006
Dataset Release Place: Greenbelt, MD, USA
Dataset Publisher: Goddard Earth Science Data and Information Services Center (GES DISC)
Issue Identification: MAC021S1_2
Data Presentation Form: Digital Science DataOnline Resource: http://disc.sci.gsfc.nasa.gov/atdd/data_products.shtml
Start Date: 2000-03-01
Latitude Resolution: 1 km at nadir
Longitude Resolution: 1 km at nadir
Horizontal Resolution Range: 1 km - < 10 km or approximately .01 degree - < .09 degree
Temporal Resolution: Two day repeat observations with a repeat orbit pattern every 16 days.
Temporal Resolution Range: Daily - < Weekly
Quality Information about the quality of MODIS data can be found at:
Access Constraints None
Use Constraints None
Data Set Progress
Distribution Media: Online (FTP)
Distribution Size: 16.5MB
Distribution Format: HDF
Role: DIF AUTHOR
Role: TECHNICAL CONTACT
Email: gsfc-help-disc at lists.nasa.gov
Goddard Earth Sciences Data and Information Services Center Code 610.2 NASA Goddard Space Flight Center
Province or State: MD
Postal Code: 20771
Creation and Review Dates
DIF Creation Date: 2006-09-22
Last DIF Revision Date: 2011-07-27