openNISAR

open NISAR Tools by Earth Big Data

These are tools to use with NISAR and some other sensors

seppo_earthaccess_credentials

Use this program to set your earthaccess credentials environment variables when on an ec2 instance in us-west-2

Run

eval $(seppo_earthaccess_credentials.py -s)

seppo_nisar_earthaccess_search

Use this program to run a search for NISAR products available through earthaccess

Example to get the complete collection of GCOV data as a geojson file:

seppo_nisar_earthaccess_search.py --product GCOV --format geojson --output gcov.geojson

Requirements

You need the earthaccess package from conda-forge

PIP:

pip install earthaccess

Mamba or Conda:

mamba install -c conda-forge earthaccess
#OR
conda install -c conda-forge earthaccess

DISPLAY NISAR Data directly from s3 urls in QGIS

Here is a quick tip on how NISAR data can be directly displayed in QGIS

You need:

1. a running AWS ec2 instance in us-west-2
2. an installation of QGIS on the instance and the earthaccess package installed
3. using the seppo_earthaccess_credentials.py program
4. the s3 url (either obtained from Vertex search or via the seppo_nisar_earthaccess_search.py tool

1. Launching an ec2 instance

We suggest to launch a instance with a good amount of RAM (32 GB) If you are a SEPPO user, just launch with

seppo_setregion us-west-2
sacc r8i.xlarge --autoLogin

2. Install QGIS on the instance

PIP:

pip install qgis earthaccess

Mamba (create a new environent)

mamba env create -c conda-forge -n qgis qgis earthaccess

3. Set the earthaccess credentials and launch QGIS

conda activate qgis
eval $(seppo_earthaccess_credentials.py -s)

4. Open s3 url

in QGIS add a raster file by using this pattern

NETCDF:/vsis3/<s3url without the s3:// prefix>

This will open a dialog to pick the h5 variables to load. Note that frequency A takes a while, whereas frequency B HHHH or HVHV for example display rather quickly.