How do I access the test satellite?

For a test satellite, you require a certificate. 

To generate certificates and access the test satellite you need to enroll (request new certificate) and generate a test eiDAS certificate by selecting postpone for Key-pair generation. You also require a valid EORI but for the experimental phase, you can use test EORIs. 

For enrolling participants - https://ca7.isharetest.net:8442/ejbca/ra/index.xhtml.

After generating the certificate, the organisation (Data Space Authority) hosting the satellite can add/ give you access to the test satellite. Steps on how to add a new participant to the satellite/participant registry.