Sutron Satlink 3 - Page 145

Sutron Corporation Satlink Operations & Maintenance Manual, Rev 8.04.2 11/3/2016 pg. 145
LABEL
This is the Label entered as a part of the setup for each
measurement. The label can be a SHEF two-character parameter
code such as HF for gauge height or PC for cumulative precipitation
or it can be any string you enter. Refer to
http://noaasis.noaa.gov/DCS/htmfiles/schefcodes.html for a list of
SHEF codes commonly used.
OFFSET
This number indicates how long ago the sensor reading was made.
The number is in minutes and it refers to the most recent data. It is
relative to transmission start.
INTERVAL
The interval indicates how often the measurement was made. It
corresponds to the setting Meas Interval.
DATA
This is data collected and logged by Satlink through measurements.
Only logged data may be transmitted. If Tx Data Content is set to
Exclude, no data from that measurement will be transmitted.
Like the binary formats, the SHEF format groups all the related data
from one measurement. The data is transmitted in ASCII with sign
and decimal point (if needed). If a data value has not yet been
recorded (or has been erased) the letter M for missing data will be
sent. The most recent data is always sent first. The number of values
sent for each measurement is set on a measurement by
measurement basis.
APPEND
OPTIONS
Satlink offers a multitude of optional values that are tacked on at the
end of the transmission. Please see APPEND OPTIONS.
15.6.1. SHEF Example
Here is a message with three active measurements. Each is set to include two readings. The
random buffer contains the string EXT. This string was given by an external device through the
RS232 port. Notice how much longer this message is compared to the earlier binary examples.
:HG 3 #15 10.20 10.15 :PC 1 #15 50 49 :TA 0 #15 -22.1 -22.0 :VB 0
12.2
In the example above :HG 3 #15 10.20 10.15 means that the sensor labeled HG read the value
10.20 three minutes prior to the start of the transmission. It read 10.15 18 minutes before the
start of the transmission, or 15 minutes before it read 10.20. Here is the complete decode:
:HG
Measurement labled HG
3
Reading is 3 minutes old
#15
15 minute measurement interval
10.20
HG sensor reading (most recent)
10.15
HG sensor reading
:PC
Measurement labled PC
1
Reading is 1 minute old
#15
15 minute measurement interval
50
PC sensor reading (most recent)
49
PC sensor reading
:TA
Measurement labled TA
0
Reading is less than one minute old
#15
15 minute measurement interval
-22.1
TA sensor reading (most recent)