[aprssig] barometric pressure units
Ian Wade G3NRW
g3nrw-radio at ntlworld.com
Mon Nov 5 10:56:38 EST 2012
From: Steve Dimse <steve at dimse.com>
Date: Sun, 4 Nov 2012 Time: 22:18:37
>The baro pressure is 5 digits following lower case b, or 10150, which sure looks like Pa / 10 (or hPa x 10) to me.
Agreed. The reported barometric pressure is 1015.0 hectopascal, or 1015
millibars in old money.
I put the message through my APRSdec decoder, which reported thus:
APRS Data Type= Posit w/o time. No APRS
Lat= 40 deg 02.66 min N Long= 75 deg 27.34 min W
Icon= WX station Overlay= (none)
Wind Direction= 319 deg Speed= 002 knots (2.3 mph 3.7 kph 1.0 m/s)
Gust Speed= 10 mph (16.1 kph 4.5 m/s 8.7 knots)
Temp= 42 degF (5.6 degC) Windchill= 42.1 degF (5.6 degC)
Rain: Last hour= 0 in (0.0 mm) Last 24 hrs= 0 in (0.0 mm)
Since midnight= 0 in (0.0 mm)
Humidity= 62 percent Dew Point= 30.0 degF (-1.1 degC)
Barometric Pressure= 1015 mbar/hP
APRSdec is at http://homepage.ntlworld.com/wadei/aprs.htm
On that page, click on the link "Demo output file" for many more
examples of its output.
I wrote the decoder 12 years ago, to help me verify the descriptions in
the APRS Specification. If anyone here knows of messages that do *not*
decode properly, please let me know. A lot has changed in the last 12
(You may also find the MIC encoder fun to play with, particularly if you
are a fixed station and you want to minimize message length).
The TS-590S Resources Page:
More information about the aprssig