Cycle slips Large jumps can be detected by using the pseudorange position estimate. In some cases, Doppler shift is also available and can be used Small slips just a cycle or so can be difficult).More common than expected because the receivers try to fix cycle slips and they often get it wrong be a small amount(slips based in SNR) MW WL and ionospheric delay jumps are common methods but can still leave slips un-detected Basics of MiT track program Track runs using a command file The base inputs needed are Obs_file specifies names of rinex data files Sites can be k kinematic or f fixed Nav file orbit file either broadcast ephemeris file or sp3 file Mode air/short/long--Mode command is not strictly needed but it sets defaults for variety of situations05/07/03 12.540 Lec 22 13 Cycle slips • Large jumps can be detected by using the pseudorange position estimate. In some • Small slips (just a cycle or so can be difficult). More common than expected because the receivers try to fix cycle slips and they often get it wrong be a small amount (slips based in SNR). • MW WL and ionospheric delay jumps are common methods but can still leave slips un-detected. 05/07/03 12.540 Lec 22 14 situations cases,Doppler shift is also available and can be used. Basics of MIT track program • Track runs using a command file • The base inputs needed are: • Obs_file specifies names of rinex data files. Sites can be K kinematic or F fixed • Nav_file orbit file either broadcast ephemeris file or sp3 file • Mode air/short/long -- Mode command is not strictly needed but it sets defaults for variety of 7