WATSON INDUSTRIES DMS-SGP01 Owner's Manual page 7

1. A single letter and a space used to indicate the start of the data string. The letter "G"
indicates the start of an inertial data string with successful GPS data input. The letter "I"
indicates the start of an inertial data string with GPS disabled or absence of valid GPS data.
The letter "R" indicates the start of a Reference data string. If the letter is in lower case
("g","i", or "r"), an error over-range condition is indicated (see below).
2. A nine character string representing the Universal Time (UTC) starting with six digits, a
decimal point, one digit and a space for up to 235959.9 Hours minutes seconds tenth
seconds (HHMMSS.S). Note: The field is filled with asterisks when the data is invalid.
("******.*")
3. A seven character string representing the Bank angle starting with a "+" or a "-", followed
by three digits, a decimal point, one digit and a space for up to ±179.9 degrees.
4. A six character string representing the Elevation angle starting with a "+" or a "-", followed
by two digits, a decimal point, one digit and a space for up to ±89.9 degrees.
5. A six character string representing the Heading angle by three digits, a decimal point, one
digit and a space for zero to 359.9 degrees.
6. A seven character string representing the Velocity starting with a "+" or a "-", followed by
three digits, a decimal point, one digit and a space for up to ±399.9 Km/Hr.
7. A ten character string representing the Latitude starting with a "+" or a "-", followed by
two digits, a decimal point, five digits and a space for up to ±89.99999 degrees. Note: The
field is filled with asterisks when the data is invalid. ("+**.*****")
8. A eleven character string representing the Longitude starting with a "+" or a "-", followed
by three digits, a decimal point, five digits and a space for up to ±179.99999 degrees. The
field is filled with asterisks when the data is invalid. ("+***.*****")
9. A six character string representing the Altitude by five digits and a space for up to 21500
feet. The field is filled with asterisks when the data is invalid. ("*****").
10. The string is terminated by a carriage return. There will then be a short interval with no
data transmission before the next string begins.
Example:
G 161409.9 -000.8
↑ ↑
Bank
UTC angle
(1) (2) (3)
space space
The string transmission rate can be improved by reducing the amount of information (data items)
transmitted. The data items transmitted can be changed by using special commands to modify the
EEPROM of the unit (see Appendix A). In addition, more channels are available for output (see
Appendix A).
The system is protected from inadvertent write-over of the EEPROM by requiring two spacebar
commands during the initialization interval to access the EEPROM or related functions.
Watson Industries, Inc.
+00.1 273.4 +028.9
↑ ↑ ↑
Elev. Head.
angle angle Velocity
(4) (5) (6)
space space space space
7
+44.86405 -091.46836 00894
↑ ↑ ↑
Latitude Longitude Altitude
(7) (8)
space space
DMS-SGP01 Rev B 03/22/2018
<CR>
↑
(9) (10)
space