u-blox ZED-F9P User Manual

u-blox ZED-F9P Interface Description - Manual
Advance Information
MGA-INI continued
Byte Offset Number
Format
Scaling Name Unit Description
12 U4 - ns ns GNSS time of week, nanosecond part from 0 to
999,999,999
16 U2 - tAccS s Seconds part of time accuracy
18 U1[2] - reserved2 - Reserved
20 U4 - tAccNs ns Nanoseconds part of time accuracy, from 0 to
999,999,999
Bitfield ref
This graphic explains the bits of ref
Name Description
source
0: none, i.e. on receipt of message (will be inaccurate!)
1: relative to pulse sent to EXTINT0
2: relative to pulse sent to EXTINT1
3-15: reserved
fall
use falling edge of EXTINT pulse (default rising) - only if source is EXTINT
last
use last EXTINT pulse (default next pulse) - only if source is EXTINT
5.12.7.5 UBX-MGA-INI-CLKD
Message
UBX-MGA-INI-CLKD
Description
Initial Clock Drift Assistance
Firmware
Supported on:
• u-blox 9 with protocol version 27
Type
Input
Comment
Supplying clock drift assistance that is inaccurate by more than the specified
accuracy, may lead to substantially degraded receiver performance.
This message allows the delivery of clock drift assistance to a receiver. See the description
of AssistNow Online for details.
Header Class ID Length (Bytes) Payload Checksum
Message Structure
0xB5 0x62 0x13 0x40 12
see below
CK_A CK_B
Payload Contents:
Byte Offset Number
Format
Scaling Name Unit Description
0 U1 - type - Message type (0x20 for this type)
1 U1 - version - Message version (0x00 for this version)
2 U1[2] - reserved1 - Reserved
4 I4 - clkD ns/s Clock drift
8 U4 - clkDAcc ns/s Clock drift accuracy
UBX-18010854 - R04 Advance Information Page 121 of 259

u-blox ZED-F9P Specifications

General

GNSS	GPS, GLONASS, Galileo, BeiDou, QZSS, SBAS
Concurrent GNSS	4
RTK	Yes
Velocity Accuracy	0.05 m/s
Time Pulse Accuracy	30 ns
Operating Temperature	-40°C to +85°C
Supply Voltage	2.7 V to 3.6 V
Channels	184
Frequency Bands	L1, L2
Dimensions	22 mm x 17 mm x 2.4 mm
Interfaces	UART, SPI, I2C