TheIGShasproducedclockresultsonlyfortheGPSsatellitesandthesearetabulatedanddistributedatthe15-minuteintervalsusedinthesp3orbitephemeridesfiles.Thereismuchinterestinincreasingthesatelliteclockintervalto30seconds(e.g.,toovercomeSAeffectsoninterpolation)andalsoinproducingstationcloc