What kind of support from equipment manufacturers do IGS users expect?
The data is archived permanently and used in long-term studies. There are therefore questions that arise about models which are no longer current, and it is helpful to have familiarity with historical products. It is also necessary for the IGS to establish what observables are directly tracked by each receiver type. We can determine this from data, but appreciate information from the manufacturer as well. Please see IGSMail #2320 (24 Jun 1999) in the archives at http://igscb.jpl.nasa.
