u-blox ZED-F9P Interface Description - Manual
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
-
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
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
-
4
I4
-
clkD
ns/s
Clock drift
8
U4
-
clkDAcc
ns/s
Clock drift accuracy
UBX-18010854 - R04
Advance Information
Page 121 of 259
