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MN002000A © 2004 Navman NZ Ltd. All rights reserved. Proprietary information and specifications subject to change without notice.
Message ID: 1310
Rate: as required (maximum rate 1 Hz)
Message length: 20 words
Word No. Name Type Units Range Resolution
1-4 Message header
5 Header checksum
6 Sequence number (Note 1) I 0 to 32 767
7 Frequency standard issue number (Note 2) UI 0 to 65 535
Temperature characteristic
8 C0 (ageing and calibration offset) (Note 3) I s/s 0 to ±2
-14
2
-29
9 C1 (linear term) (Note 3) I s/s/ºC 0 to ±2
-20
2
-35
10 C2 (second order term) (Note 3) I s/s/(ºC)
2
0 to ±2
-26
2
-41
11 C3 (third order term) (Note 3) I s/s/ºC)
3
0 to ±2
-32
2
-47
12 TINF (inflection point) (Note 3) I ºC 0 to ±100 0.01
Temperature dynamics
13 D0 (Note 4)
I
14 D1 (Note 4)
I
Temperature sensor calibration
15
TREF(calibration reference temperature)
(Note 5)
I ºC 0 to ±100 0.01
16
T0 (temperature sensor reading at TREF)
(Note 5)
UI counts 0 to 65 535
1
17 S0 (temperature sensor scale factor) (Note 5)
I ºC/count 0 to ±23 2
-18
Uncertainty coefficients
18 U0 (Note 6)
I s/s 0 to ±2
-14
2
-29
19 U1 (Note 6) I s/s/ºC 0 to ±2
-20
2
-35
20 Data checksum
Note 1: The sequence number is a count that indicates whether the data in a particular binary message has been updated or
changed since the last message input.
Note 2: Unique identification of each update. This allows a different set of data to be in use while newer data are only stored to
EEPROM. The issue number is preserved from run to run if non-volatile storage is available.
Note 3: Defines a cubic in (T – TINF). Over a range of TINF+65 degrees C, each term can produce from 0.002 to 60 ppm,
approximately.
Note 4: *** TBD ***. These parameters will be used to compensate temperature dynamics transients.
Note 5: These parameters define the temperature sensor scaling according to the equation:
T = TREF+ (TFILT- T0) S0
Note 6: Defines a linear equation in (T – TINF)’ Over a range of TINF +65°C, each term can produce from 0.002 to 60 ppm,
approximately.
Table 3-36 Message 1310 (frequency standard input parameters)
3.5.2.14 Message 1310 (frequency standard input
parameters).
This message defines the temperature polynomial,
coefficients, and scale factors used by the
receiver’s frequency standard compensation
model. The contents of the ‘frequency standard
input parameters’ message are described in Table
3-36.
Note: Message 1310 is primarily used to input key
parameters from GPS systems without non-volatile
storage. This is why the format of output Message
1110 is exactly the same. In other words, the
output message is used to capture data while the
input message is used to restore data.