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A collection of services for ZTF FITS image access and discover

The original purpose of this project was to bypass CORS restrictions on the ZTF FITS image access for JS9 widget used by SNAD Viewer.

Services

Caching proxy of IRSA IPAC ZTF FITS archive

This service is an Nginx caching proxy for https://irsa.ipac.caltech.edu/ibe/data/ztf/products. It is represented by two Docker containers: one for the Nginx proxy itself (see proxy folder) and another one is for filling the directory tree cache on the service startup (see proxy-cache-filler). Currently, the service is deployed to two locations: http://sai.fits.ztf.snad.space and http://uci.fits.ztf.snad.space, see docker-compose-sai.yml and docker-compose-uci.yml for details. However, the end user should use a redirect proxy to access the service.

Geo-IP redirect proxy

The service is geo302 redirect proxy that redirects the user to the nearest service location. It sends health checks to the services and updates the list of available services periodically. The service is deployed to http://fits.ztf.snad.space, see docker-compose-geo302.yml for details.

FITS finder API

The service is an API that returns a list of ZTF photometry products for a given observation of a ZTF DR object. See fits-finder/README.md for details. It is deployed to http://finder.fits.ztf.snad.space, see docker-compose-finder.yml.