GPS virtualiosios referencinės stoties regresinis modelis, taikant kolokacinius signalinius parametrus

Abstract

Straipsnyje pateikiamas GPS metodu nustatytu tašku koordinaciu, nešlio faziu skirtumu bei pseudoatstumu pataisu skaiciavimo principas, sudarant GPS virtualiuju stociu regresinius modelius pagal kolokacinius signalinius parametrus. Kolokaciniai signaliniai parametrai n ra susije funkcin mis ir tikimybin mis priklausomyb mis su pagrindiniais regresiniu lygciu parametrais, taciau egzistuoja tikimybin priklausomyb tarp papildomu ir signaliniu parametru. Regresiniu lygciu parametru reikšm s apskaiciuojamos mažiausiuju kvadratu metodu pagal žinomas tikslias referenciniu stociu koordinates bei išmatuotas atitinkamu GPS dydžiu reikšmes. GPS vartotojo imtuvu išmatuotu dydžiu pataisos skaiciuojamos pagal sudarytus regresinius prognozinius modelius taikant apskaiciuotas parametru reikšmes. Prognoziniu modeliu tikslumas ivertinamas kovariaciju matricomis.

The principle of calculating coordinates determined by GPS method and carrier’s phase shift and corrections for pseudoranges as well as applying the regression models created by collocation signals parameters of collocation is presented in the article. Collocation signals parameters are not related by functional and probability dependence with main regression equation parameters but exists probability dependence between additional parameters and signal parameters. The values of regression equations parameters are calculated by applying the methods of collocation and least squares according to accurately known coordinates of reference stations and the appropriate values measured by GPS. Corrections of measured values by GPS user recipient are calculating by regression prognostics models created in virtual stations applying estimated parametric values.