CAM-M8 - Data Sheet
GNSS receiver, AssistNow Autonomous automatically generates accurate predictions of satellite
orbital data (“AssistNow Autonomous data”) that is usable for future GNSS position fixes. The
concept capitalizes on the periodic nature of GNSS satellites; by capturing strategic ephemeris data
at specific times of the day.
u-blox’s AssistNow Autonomous benefits are:
•
•
•
Faster fix in situations where GNSS satellite signals are weak
No connectivity required
Compatible with AssistNow Online (can work stand-alone, or in tandem with the AssistNow
Online service)
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No integration effort, calculations are done in the background, transparent to the user.
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The u-blox ROM-based CAM-M8Q/C receiver can use AssistNow Autonomous to calculate GPS
only orbit predictions for 3 days.
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For more details on A-GNSS see the u-blox 8 / u-blox M8 Receiver Description Including Protocol
Specification [2].
1.7 Augmentation systems
1.7.1 Satellite-Based Augmentation System (SBAS)
The u-blox CAM-M8 series positioning modules support SBAS. These systems supplement GPS data
with additional regional or wide area GPS augmentation data. The system broadcasts augmentation
data via satellite and this information can be used by GNSS receivers to improve the resulting
precision. SBAS satellites can be used as additional satellites for ranging (navigation), further
enhancing precision and availability. The following SBAS types are supported with CAM-M8
modules: GAGAN, WAAS, EGNOS and MSAS.
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For more details, see the u-blox 8 / u-blox M8 Receiver Description Including Protocol
Specification [2].
1.7.2 QZSS
The Quasi-Zenith Satellite System (QZSS) is a regional navigation satellite system that transmits
additional GPS L1 C/A signals for the Pacific region covering Japan and Australia. CAM-M8Q/C
positioning modules are able to receive and track these signals concurrently with GPS signals,
resulting in better availability especially under challenging signal conditions, e.g. in urban canyons.
The L1- SAIF signal provided by QZSS can be enabled for reception via a GNSS configuration
message.
1.7.3 IMES
The Japanese Indoor MEssaging System (IMES) system is used for indoor position reporting using
low-power transmitters which broadcast a GPS–like signal. CAM-M8Q/C modules can be configured
to receive and demodulate the signal to provide an in-door location estimate.
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This service is authorized and available only in Japan.
IMES reception is disabled by default
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UBX-15031574 - R04
Production Information
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