Why a request is not answered

There is a long list of issues. A couple of them relate to measures fending off spams and hacks and your job might have implied or created a pattern that looked like an untoward request.

Filling out the site form:
The strict column format is shown together with an instructive comment inside the form window. If a site is not within 10 km from the earth's surface, a warning is issued already at the http stage.

Blank space is required for filling, not tabs. It must be the character ASCII 32 decimal, 20 hex, usually generated by the space bar on your keyboard. If characters above ASC 127 (dec) or hex-coded characters appear, the request is termed SPAM. Reason: Abusers send mail directly to the services email address with form elements copied from the home page but instead of sites they enter rubbish like text, links, photos, typically with a lot of hex-translations when mailto.cgi (our extended version) processes it. That stuff goes straight into /dev/null. The sender addresses are blacklisted.

A common field element that spammers simply copy is the default value of the (ocean tide) model, DFLT. Such doesn't exist. It's simply a trap. A request for model DFLT goes the same way as above.

However, the DFLT model can have been selected in an otherwise perfect request. Soon there will be extended parsing so that the sender receives an e-mail asking to resend the request for one of the legal models. This will be the only circumstance on which the system will contact a sender.

The service dismisses request that are in UNICODE, UTF8, or contain html markup. If you send your requests by e-mail to loading_kanelbulle_holt.oso.chalmers.se, make sure the mail composer produces only bare and plain ASCII, no markups.

Site names may contain alphanumeric characters plus a few others (sorry, we should give a list of permissible symbols here), but accented characters must be avoided. Some problematic characters are rejected at the http-page with the unspecific message "garbled". For instance, a slash `/ ยด is not allowed. Spaces are discouraged as they are interpreted to separate site name and monument code. Two separate spaces (like in "Bar Le Duc"), and the loading calculation runs havoc! Use a contiguous set of spaces to delimit a site name and its IERS monument code, if it has one at all.

Legitimate are  \ " ' - _ ? &
Illegitimate are / $
Untested yet:  : ; . = ( ) [ ] { } !