ASS PhseRnge ises in RTK proessing Gle Zyrynov Ashteh Workshop on GSS Bises 202 Bern Switzerlnd Jnury 8-9 202
Sope Simplified oservtion models for Simplified oservtion models for ASS FDMA speifi: lok nd ises Clirtion ASS is lss 2
Mke life simple To mke everything simple Zero seline (two reeivers shring sme ntenn) Strt with Single Differene. Benefits: o ionosphere o troposphere o stellite orit nd lok errors o ntenn vritions Multi-pth environment is extly the sme Wht is left? Reeiver Clok Bises oise 3
SD Codes Simplified oservtion model for Single Differene Code on zero seline P B P P Men B P 4
5 SD Crrier Phse Simplified oservtion model for Single Differene Crrier Phse on zero seline i i
SD ASS Codes Simplified oservtion model for Single Differene ASS Code on zero seline P B P B Men P 6
7 SD ASS Crrier Phse (sme hw) Simplified oservtion model for Single Differene ASS Crrier Phse on zero seline (sme h/w) i i i (for dent frequenies) 562 5 meters. ms (for dent frequenies) 0.0087629 8 meters meter P Men
8 SD ASS Crrier Phse (different hw) Simplified oservtion model for Single Differene ASS Crrier Phse on zero seline (different hrdwre) P Men? It is oserved tht this is follows liner pttern. It my e viewed s smll (frtion of yle) is Or it my e viewed s delt-lok etween Code nd Crrier.
Clirtion Bis n e non-liner Though we hve oserved only minor vritions ut we lerly see smll non-linerity in ASS rrier phse fter pssing low-end filters Generlly is should e estimted for eh ASS frequeny independently (proly s vrition from liner pproximtion) Only ASS should e used for lirtion (this minly onerns proper lok estimtion prior to rrier phse is estimtion itself) Only from orresponding frequeny should e used (i.e. only L2 odes should e used for L2 rrier phse ises lirtion) 9
Wht we would like to see hppen Stndrdized proedure to estimte ASS rrier phse ises Stndrdized mens to speify so ll ASS is lss whih would llow one to pply pproprite ises. 0
Asolute lirtion vs. Golden-Reeiver At this stge solute lirtion does not seem to e possile. Even different simultors would introdue their own speifi ises. Seleting Golden-Reeiver my offend some vendors. A reltive lirtion enter ould e estlished mnufturers sumitting their reeivers to single uthority (e.g. IGS). This uthority would provide: estimted ASS rrier phse ises for eh pir of reeivers rw smples (reorded from simultor or in rel-time) Any new mnufturer ould sumit their reeivers to hve them lirted to hve lirtion results ginst other ville reeivers pulished to hve orresponding rw pulished to hve ASS rrier phse is lss nme ssigned.
Bis vritions Only High-end hrdwre my gurntee stle performne nd negligile vrine in hw ises. Low-end hrdwre my introdue notiele is vritions. on-physil referene sttions my not extly mimi ises of physil reeiver. There is the need to hve ASS is lss eing ompnied y orresponding stndrd devition vlues. For physil reeivers estimtes for these STD ould e provided y proessing from not one ut few smples of h/w similrly s it is done with ntenne. 2
Finl Slide. Thnk you. 3