Access data#
If you feel as lost as we did for accessing data, this wiki entry will be for you!
Earth observation / remote sensing#
We focused on the following satellites
Landsat
Sentinel 2 a/b
MODIS
Data access#
via Ocean Color website#
The easiest way we have found to interact with this data is to request a list of download URLs from NASA’s Ocean Color website https://oceancolor.gsfc.nasa.gov, and then batch-process these in Python.
via Planetary Computer Hub#
For remote sensing data, there is a cool new tool from Microsoft which lets you access all sorts of remote sensing data.
You have to request access, but currently (Dec 2023), it is free and we had no problems with getting access.
Use case: L3 chlorophyll and temperature data from MODIS via ocean color#
Step 1: Website#
use oceancolor: https://oceancolor.gsfc.nasa.gov/l3/
you need to create an account
Step 2: Settings#
Standard
Aqua-MODIS
chlorophyll concentration or SST (11u daytime)
monthly
4km
1/1/2021 to 31/12/2022
click the blue “Extract or Download Data” button
Step 3: List of links#
Settings: Type=Binned, Data Retrieval Method=Download
click green “Download” button
you will get a list with links like this: https://oceandata.sci.gsfc.nasa.gov/cgi/getfile/AQUA_MODIS.20230801_20230831.L3b.MO.CHL.nc
Step 4: Save files#
Either you write a script or you copy each link into your browser to save the images
One of the .nc files may have a size of 215MB
Solar system / remote sensing#
We focused on the following spaceprobes
Cassini
Data access#
via NASA pds imaging server#
via PILOT#
After selecting a region, you can download a csv file with links of all relevant images.
A file has e.g. 200kb
Open cub files#
via Integrated Software for Imagers and Spectrometers v3#
Using the Integrated Software for Imagers and Spectrometers v3
Looks very dodgy from the start, but it surprisingly works.
It is a digital image processing software package to manipulate imagery collected by current and past NASA and International planetary missions.
Access it here: DOI-USGS/ISIS3
open an image DOI-USGS/ISIS3
documentation: DOI-USGS/ISIS3
documentation: https://isis.astrogeology.usgs.gov/7.0.0/index.html
Use case: VIMS from Cassini#
Step 1: access data “raw cube data”#
We tried the VIMS before (an imaging instrument from Cassini)
Step 2: open cub files#
use Integrated Software for Imagers and Spectrometers v3
Medical images#
We focus on the following images
OCT/OCTA
Fundus
Cells
Data access#
via Grand-Challenge#
multiple datasets
via IEEE#
multiple datasets
via Cellpose#
BLOB image dataset, including cells and other countable objects