Data Sheet

NEO-M8P - Data Sheet
UBX-15016656 - R06 Early Production Information Functional description
Page 11 of 30
1.7 Raw data
The NEO-M8P modules provide raw measurement data for civil L1 band GPS, GLONASS and BeiDou signals
including pseudo-range and carrier phase, carrier Doppler frequency and message payloads. The data contained
in the UBX-RXM-RAWX message follows the conventions of a multi-GNSS RINEX 3 observation file and includes
pseudo-range, carrier phase and Doppler measurements along with measurement quality data. The UBX-RXM-
SFRBX message provides the demodulated, parity-checked navigation and signaling message bits for each
satellite currently tracked by the receiver.
Raw measurement data are available once the receiver has established data bit synchronization and time-of-
week. Message data are available for all signals tracked at a sufficient level to achieve data bit and frame
synchronization. For more information see the u-blox 8 / u-blox M8 Receiver Description Including Protocol
Specification [2].
1.8 Assisted GNSS (A-GNSS)
Supply of aiding information, such as ephemeris, almanac, approximate position and time, will reduce the time
to first fix significantly and improve the acquisition sensitivity. The NEO-M8P products support the u-blox
AssistNow Online and are OMA SUPL compliant.
1.8.1 AssistNow
TM
Online
With AssistNow Online, an internet-connected GNSS device downloads assistance data from u-blox’s AssistNow
Online Service at system start-up. AssistNow Online is network-operator independent and globally available.
Devices can be configured to request only ephemeris data for those satellites currently visible at their location,
thus minimizing the amount of data transferred.
For more details see the u-blox 8 / u-blox M8 Receiver Description Including Protocol Specification [2], and
MGA Services User Guide [6].
1.9 Augmentation systems
1.9.1 Differential GNSS (DGNSS)
When operating in RTK mode RTCM version 3 messages are required and the NEO-M8P supports DGNSS
according to RTCM 10403.2 [7]. The RTCM implementation in the rover and base-station variants provides
decoding of the following RTCM 3.2 messages: