SNOTEL GOES Manual Revision 2b - February 17, 2011 page 7 of 10
Micro Specialties, Inc. Wasilla, Alaska
messages in MBD format, as defined in the sitedefs.txt configuration file. The
application never deletes or shrinks this data file.
GOES Message Archive Files – The application automatically archives all
GOES messages, in original form, to archive files in the working directory. One
file will exist for each calendar date, and each file will contain all GOES
messages GOES time-stamped for that date. Duplicate messages are
discarded. Example GOES Message Archive file name for March 3, 2008:
20080303.goesMsgs
GOES Data Modem Types Currently Supported
Campbell Scientific TX312 Modem - Supported as of 8/9/2007
The TX312 data modem can transmit data over GOES in either the normal CSI low
resolution data format, or in a higher resolution, 18 bit integer format. In low resolution
mode, date and time values can be directly inserted into the GOES data stream. In high
resolution mode, date and time are not directly inserted into the data stream, but may
be inserted by first redirecting the date and time to input locations, then sampling those
input locations in the output section of the CR10X program. Note that as of this
writing, the high resolution mode has not been tested.
MsiDCSdecode currently expects data from TX312 modems to be presented in
low resolution format only.
TX312 Rules:
Use normal, low resolution mode in the CR10 program
All date and time information is derived from the first date/time fields (fields 0 and 1) in each
GOES data message, so there is no reason to include date and time in each data group,
although it won‟t kill the process if you do.
Array IDs are not included in the low resolution TX312 GOES data stream, so if you need
these, you will have to redirect them to input locations, then sample those input locations in
the program‟s output section.
All date/times and all data fields are transmitted as a single, all inclusive message group in
the GOES data stream. msiDCSdecode assumes that:
o The date (julian) is the first data field of the data stream.
o The time (hhmm) is the second field.
Keep track of each data group‟s starting and ending positions within the data stream, and
give that information to Rose. For example: group 1, 2..17 defines group number 1 as
extending from the third field through the 18
th
field of the data stream (16 sensors) . The first
field is the date, and the second field is the time.
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