PT - JOURNAL ARTICLE AU - Azeez, Althaf AU - Hablani, Hari TI - Assessment of errors in NavIC observables for stationary receivers AID - 10.1002/navi.355 DP - 2020 Jun 20 TA - NAVIGATION: Journal of the Institute of Navigation PG - 347--364 VI - 67 IP - 2 4099 - https://navi.ion.org/content/67/2/347.short 4100 - https://navi.ion.org/content/67/2/347.full SO - NAVIGATION2020 Jun 20; 67 AB - Our objective in this paper is to assess all errors in NavIC’s pseudorange so that they can be mitigated or accounted for appropriately in the dynamics model to achieve high-accuracy navigation. Multipath errors in the L5 and S1 pseudoranges are different; hence, oscillatory multipath is removed using sidereal repeatability for these frequencies separately for accurate iono delay estimation. Iono delay estimates using uncompensated pseudoranges are 7-m greater than the normal night time estimates due to multipath. When oscillations are removed, the difference reduces to ≤3 m. Dual-frequency iono delay estimates using code phase are within two-sigma of the grid-based estimates. A comparison with the NTCM-GL and Klobuchar iono delay estimates is presented for the low-latitude region in India. The ephemeris line-of-sight errors blended with the unknown multipath bias errors are estimated using a low-pass filter and are found to lie at the edges of the two-sigma signal-in-space error.