This file should be sent back to the CB and an announcement of the modification should be made through an IGSMail message. This procedure ensures that modifications of the station log done by the CB will be preserved. Following are some guidelines for when IGSMail messages should be sent. Here things like radome, monument, antenna and receiver changes come to mind but also things like cutting trees, new buildings etc. This seems to be unproblematic in most cases but in some cases it causes cm position changes.
Final judgment is left to the station managers.
Resubmission of data. Sometimes data is resubmitted because it was incomplete originally. For the ACs it would be helpful if an IGSMail would inform them about that. Only if there are severe problems causing weeks of missing data an e-mail would be a good thing. Local Data Centers 4.1 General Depending on the policy of the respective agencies, the tracking data and the auxiliary station information of the local network can be made available through computer networks or bulletin boards etc.