- TheTestofGPSTECHardwareBiasesEstimatingMethodsandWAASIonsphericGridAlgorithm;(Theapproachiscalledthewide-areaaugmentationsystem,orWAAS.ItanalysesthequantityofionospherePiercepointingridabovethereferencestations,andsimplydiscussesthequestionofreferenc...
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