Aircraft Observations Available through AWIPS
Three PACJET aircraft products are available through AWIPS. These are
all text products, graphical products are under development.
PIL | Product description |
MIAREPNT2 | MinObs: 30 second flight data. |
MIAREPPN3 | Dropsonde data. |
MIAREPPN0 | Reconnaissance messages. |
How to read the MinObs | How to install the Obs
All WR WFOs:
If you've done the AWIPS installation described in the PACJET Alert
ADMMSG of 1250 PST 7 February 2001, you can now view PACJET flight data
on your text workstation. As there indicated, these data can be
retrieved by typing in the PIL: MIAREPNT2
What you'll then get is a text product that looks like the following
(Note: see the PACJET home page for latest info on when the aircraft
will be flying).
URNT40 KWBC 090850
NOAA3 WXWXE TRAIN
084030 3920 12457 2861 -0062 230025 +031 +018 234026 999 999
084100 3922 12458 2875 -0064 236027 +031 +013 236027 999 999
084130 3924 12458 2877 -0066 240027 +030 +015 240028 999 999
084200 3926 12459 2871 -0067 241026 +030 +016 240027 999 999
084230 3927 12500 2872 -0068 240024 +030 +015 240025 999 999
084300 3929 12500 2873 -0071 238025 +029 +021 237025 999 999
084330 3931 12501 2873 -0073 238027 +030 +020 237028 999 999
084400 3933 12502 2878 -0075 229027 +030 +028 234029 999 999
084430 3935 12502 2898 -0079 233020 +024 +023 215023 999 999
084500 3937 12503 3009 -0084 231021 +022 +014 234023 999 999
084530 3939 12503 3006 -0086 228021 +021 +017 223021 999 999
084600 3941 12504 2937 -0083 221024 +026 +012 222025 999 999
084630 3943 12504 2879 -0083 231029 +028 +012 230030 999 999
084700 3945 12504 2876 -0085 223028 +026 +013 227029 999 999
084730 3947 12505 2879 -0087 224025 +026 +009 222026 999 999
084800 3949 12505 2882 -0089 226026 +027 +011 226026 999 999
084830 3951 12506 2882 -0091 227027 +027 +012 227028 999 999
084900 3952 12507 2885 -0093 227026 +026 +011 228028 999 999
084930 3954 12507 2881 -0094 221021 +025 +010 218021 999 999
085000 3956 12508 2881 -0096 213024 +024 +009 211024 999 999
These are aircraft flight level meteorological data taken at 30-sec
intervals. The data are transmitted collectively every 10 minutes.
Here's a basic guide to decoding these reports:
Col. 1: HHMMSS The time of the observation in hours, minutes and
seconds (UTC). All averages (except peak wind) are
centered around this time.
Col. 2: LLmm The latitude of the observation in degrees and minutes.
Col. 3: LLLmm The longitude of the observation in degrees and
minutes.
Col. 4: PPPPP The pressure altitude in feet.
Col. 5: +/-DDDD The D-value (Geopotential Altitude - Pressure Altitude)
in feet. There will always be a leading sign (+ or -)
followed by 4 numeric characters (leading zeros if
required).
Col. 6: WWWSSS WWW: The wind direction in degrees, with 0 being true
North, increasing clockwise.
SSS: The wind speed in knots.
Col. 7: +/-TTT The air temperature in degrees and tenths Celsius.
Col. 8: +/-ddd The dew point temperature, encoded the same way as air
temperature.
Col. 9: wwwsss www: The direction of the peak wind during this
interval (30 sec, 1 min, etc.). The peak wind is
defined as the maximum 10-sec average wind.
sss: The speed of the peak wind in knots.
Cols. 10 and 11: Not used here -- each will show up as 999.
As an example, here's the first line of the above report and the decoded
information contained therein:
084030 3920 12457 2861 -0062 230025 +031 +018 234026 999 999
Observation time: 0840 and 30 sec UTC
Latitude: 39.2 N Longitude: 124.57 W
Pressure Altitude: 2861 ft
D-value: -62 feet
Wind: 230 deg at 25 kts
Air Temp: 3.1 C
Dew Point: 1.8 C
Peak wind during past 30 seconds: 234 deg at 26 kts
If dropsondes are deployed, data will be transmitted on AWIPS with the
PIL MIAREPPN3 and recon messages (text description of something
interesting observed from the plane) with the PIL MIAREPPN0. To decode
the former (and for further info on the flight level data), see
Appendix G to the National Hurricane Operation Plan, which is available
on-line as a PDF document at:
http://www.ofcm.gov/NHOP/00/nhop00.htm
...Warren Blier (WFO Monterey SOO)
How to read the Obs | How to install the Obs
1) on as2 edit /data/fxa/nationalData/ispan_table.template
to add the following lines:
URNT40KWBC MIAREPNT2 (this file is in alphabetical order)
URPN10KWBC MIAREPPN0 (that's a zero at the end)
UZPN13KWBC MIAREPPN3
2) cd /awips/fxa/data/localization/scripts
3) ./mainScript.csh -text
4) stop StdDBDecoder (ps -ef | grep Std and then kill, it will
restart on its own)
The MinObs product will then store in MIAREPNT2, reco messages in MIAREPPN0,
and dropsondes in MIAREPPN3.
Kevin Schrab
SSD/NWS
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