tried a thing, did not work

esa_data.js will fetch remote json at http://estracknow.esa.int/live/mission/SOLO

however the response body will not JSON.parse() because it contains scientific notation without quotes around it

todo

at <some hosting>, fetch the remote every 30 minutes, host the copy.

fetch the file from frontend as raw text and convert to json (see esa_data.js)

To add a new ESA probe:

todo