A MAAP DPS / OGC Application Package for accessing a NISAR GCOV granule, subsetting selected variables, optionally subsetting by bounding box, and writing the result to an intermediate Zarr store.
This job:
- opens a NISAR GCOV granule from either S3 or HTTPS
- reads one or more variables from
/science/LSAR/GCOV/grids/frequencyA - optionally subsets the data using a bounding box
- writes the subset to a Zarr output
- writes a small manifest JSON alongside the Zarr output
The current workflow is designed for MAAP DPS execution and is intended to support cloud-based NISAR access and downstream processing.
The job supports three access modes:
-
s3
Uses MAAP / ASF temporary S3 credentials and reads the granule from S3. -
https
Uses HTTPS only when non-interactive Earthaccess credentials are available. -
auto
Prefers S3 first, then HTTPS only if non-interactive Earthaccess credentials are available.
https://nisar.asf.earthdatacloud.nasa.gov/NISAR/NISAR_L2_GCOV_BETA_V1/NISAR_L2_PR_GCOV_003_005_D_077_4005_DHDH_A_20251017T132451_20251017T132526_X05007_N_F_J_001/NISAR_L2_PR_GCOV_003_005_D_077_4005_DHDH_A_20251017T132451_20251017T132526_X05007_N_F_J_001.h5
s3://sds-n-cumulus-prod-nisar-products/NISAR_L2_GCOV_BETA_V1/NISAR_L2_PR_GCOV_002_109_D_063_4005_DHDH_A_20251012T182508_20251012T182531_X05010_N_P_J_001/NISAR_L2_PR_GCOV_002_109_D_063_4005_DHDH_A_20251012T182508_20251012T182531_X05010_N_P_J_001.h5
`
access_mode = s3
vars = HHHH
group = /science/LSAR/GCOV/grids/frequencyA
bbox = 148325,5392805,519115,5759995
bbox_crs = EPSG:32633
out_name = nisar_subset.zarr