Sutron 9210 - SHEF and SHEFFIX Formats

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characters with supported characters. Please note that this requires that the characters be
translated back upon reception and before they can be passed to a decoder.
The following table describes the character translation that’s performed:
ORIGINAL
HEX
CHAR
REPLACEMENT
HEX
CHAR
5B
[
31
1
5C
\
32
2
5D
]
33
3
5E
^
34
4
60
`
35
5
7B
{
36
6
7C
|
37
7
7D
}
38
8
7E
~
39
9
SHEF and SHEFFIX Formats
“SHEF” format conforms to NESDIS Standard Decimal format specifications. The
format is ASCII and readable by persons without the aid of a computer.
The standard decimal format is human readable while binary formats require some
processing before the values can be read. The standard decimal format is generally twice
as long as the binary transmission. This means that less data can be sent in the same
amount of time using the standard decimal format.
An example of a standard decimal format message is shown below. This message comes
from a station with three sensors in the self-timed group. The sensors have been named
HG, PC and TA. The battery voltage is the voltage of the battery just prior to
transmission.
:HG 0 #15 10.20 10.15 :PC 0 #15 50 49 :TA 0 #15 -22.1 -22.0 :VB 0 12.2
Battery
TemperaturePrecip
Gauge Height
Offset Time
Data Interval
Newest gauge reading
Older gauge reading (by data interval time)
The names HG, PC, TA and VB used in the transmission are called SHEF Physical
Element codes (PE codes) and are the names given to the outputs in the 8310. Be sure to
change the output names if you want specific codes sent in the transmission. NESDIS
has a recommended list of SHEF PE codes on its website at
http://noaasis.noaa.gov/DCS/htmfiles/schefcodes.html