In order to receive the Veripos Standard+ service, the user must use a L-Band demodulator capable of receiving and decoding the differential corrections. With the Veripos Standard+ service, particular consideration is given to providing the user with the flexibility to use either single or dual-frequency GPS receivers. This is achieved by having corrections available in three different forms from the demodulator:
a) RTCM Type 15 message Provides users with the flexibility of generating a “iono-free” position solution using compatible GPS hardware or processing software. Ionospheric delay data for each Standard+ reference station is available from the Veripos demodulators in standard RTCM Type 15 message format.
b) RTCM Type 1 “Model Compensated Iono-Free” (MCIF) message The MCIF process adapts the RTCM Type 1 corrections transmitted as part of the VERIPS Standard service so that when applied in a L1 GPS receiver or calculation, the resulting position solution is free from the effects of the ionosphere. If the GPS receiver or calculation is applying a Klobuchar model that cannot be disabled, the Type 1 MCIF message will compensate for the modelling applied. To permit measurement of the ionospheric delays at the user location, a dual-frequency GPS receiver must be connected to a Veripos demodulator with the Standard+ option enabled.
c) RTCM Type 1 “Iono-Free” (IF) Message The IF process adapts the RTCM Type 1 corrections transmitted as part of the Veripos Standard service so that a “iono-free” DGPS position can be generated in a L1 GPS receiver or calculation. The Type 1 IF message can be used by GPS hardware or software that does not employ any Klobuchar modelling. To permit measurement of the ionospheric delays at the user location, a dual-frequency GPS receiver must be connected to a Veripos demodulator with the Standard+ option enabled.
Full details of Veripos equipment can be found in the equipment section of the website.
