Multi-channel Gps Common View Time Transfer Experiments: First Results and Uncertainty Study
نویسندگان
چکیده
Far regular TAI computations, GPS time ms&r is cwentIy mid out using a number of common-wkrv observations &om singZec.banne1 flngk-fiqiency U A code receivers o p t i n g in a schdded mde. n i s mode of opemtion I h i b the accuracy of time &am& and serious problems of ageing of &e current r w e i m are now king encountered This paper considers all-in-view mwuremen& &om muIti-channel dd-fiquency GPS time receivers used to out time irans& between remote Jocaaons, t&ng into acwunt dlposible common-view obsmtions far a given heline. We have used &ta h Allen O s h e Associates ZTR4P receivers op%ratling at the BIPM the A???! the ROA and the USNO. Two appmchcs have baan USBd First we caisiruc~ hr each shtion, staa&rd J h n u t e wmmon-view &ervations ofall avaiZable SateIZites and u s e a b d & to compute time diffzrrences for tiire haselines. We find &at the muI& are &tier than those &in& with singI&anneI receivers, and are about in a w d with what mkht be expected h the n u m k of mewurments. Second we use raw short-tem data to wmpute time aYX%vnces and wmpare the results uith the standard appmch for one baseline, We find that the raw data provide a &ttw measurement of the time link ,!%an is possible using the s m h d approach. In all cases tbe equipment in we &splay large variations in i%e calihtion delay that are like& to be induced by the em+mrnent andrequle a m t i v e action,
منابع مشابه
Common-view Time Transfer Using Multi-channel Gps Receivers
Common-View GPS has proven to be an accurate and reliable time transfer method capable of producing estimates of clock differences with a precision of 2-3 nanoseconds with averaging'. The advent of multichannel timing receivers promises enhanced coverage and increased precision due to the large number of common-view passes available between any two sites. This paper discusses the processing tec...
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