ADSB Wx Data Examples from 1 Jan2011
I posted this ADSB WX Info piece today on the MGL Forum and thought it kind of fit into this ADSB thread of why anybody might want ADSB including out! I do believe 100% in ADSB out, just wish the general aviation world and FAA would appreciate it enough to make it a requirement someday (by 2020?). Seems simple to me, I have in cockpit precise information of all aircraft in my vicinty, better than TCAS, and those aircraft get to know where I am, its not a game of statistics, its just common sense. I have had enough close encounters through the years to actually believe that Mid-Airs can happen and that the big sky theory is not absolute. What has been mentioned very little in this thread is that the airlines get little safety benefit from Next Gen, maybe some more efficient routing, but there is no weather over Mode-S, and the airlines are not required to install NextGen ADSB technology. The FAA is providing us, the Gen Aviation crowd a Free Service (ADSB Weather) that along with ADSB Out-In enhances safety with only a single upfront cost. The only maintenance cost is an altitude encoder check which is already required for your transponder. You might say you have already paid for this with user taxes and you would be right, but this is a real service your taxes are funding for our benefit, and it works. One of the few really good deals I have ever seen from the FAA or Government. Now onto my discussion about ADSB weather, what it provides in its raw form, and how it apears to work.
I have been collecting WX data to support ADSB integration and wanted to share some actual ADSB WX Pictures & Information to let our (MGL) FORUM compare ADSB WX & NEXRAD Graphics with normal NEXRAD WxServc Graphics. The Text below is actual WX Info sent as text in the ADSB transmission I recorded this morning around 1648UTC and includes METARS, TAFS, PIREPS, SPECIAL WX Observations, and Winds Aloft.
The included WX Pictures are from the WX front that went along the Gulf Coast this morning. Having any real information on what ADSB includes or does not include and how it compares with other WX sources has been hard to come by so doing this data collection has been both fun and educational on what ADSB provides and how it really works. The Raw ADSB WX is black around the actual wx because that is how the data is designed to be sent, the actual ADSB wx should be integrated and displayed overtop of normal EFIS graphical displays. The ADSB datalink WX comes with Location and 5 levels of WX intensity. Obviously NEXRAD has a lot more, and when you look at the graphics you will see for example that a lot of the darker NEXRAD Yellow shows up as ADSB Red! In my observations of the ADSB data update rate it appears that the Regional WX picture is updated completely approximately every 6 minutes, with a partial update every 3 minutes. The national WX picture gets updated approximately every 12 to 15 minutes (no partial updates).
The ADSB Transmission I have been collecting data from is (I believe) being sent from the ADSB site at Choctaw Navy Auxiliary Airfield about 14NM's west of my house. This is part of the Gulf Of Mexico ADSB Network. I am using a NavWorx ADSB 600-B UAT connected to a standard Transponder stubby wire antenna and GPS antenna, the unit is controled via its serial Mntc port and I am collecting the ADSB data via its RS232 serial port at 115200 KBaud. ARINC429 does not work because there is no ARINC message standard for ADSB weather. Only Traffic. The NavWorx serial port supports TIS-A & B (Traffic) and FIS-B (WX).
Raw ADSB WX Graphic with 5 color WX shading for WX intensity.
Natl WX Servc standard NEXRAD WX Graphic with their 15 colors for WX intensity.
Raw ADSB National WX Graphic, they only seem to send out data for areas that actually have weather.
NatlWX Servc NATIONAL NEXRAD WX Graphic
NavWorx Web SIte
http://navworx.com/index.asp
Cecil
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Selected ADSB RAW WX text included in todays collected data (there is a lot of data, this is a small part of a 30 minute transmission)
Ownship lat: N30°24.01, long: W086°37.42
ID 8
ID 8
ID 413 TAF KSVN 0113/0213 15005KT 3200 BR SCT005 BKN060 QNH3014INS EBECMG 0116/0117 17009KT 9999 NSW SCT060 BKN150 QNH3006INS EBECMG 0201/0202 18005KT 9000 -SHRA BKN025 BKN150 QNH3004INS
EBECMG 0211/0212 22009KT 9999 NSW BKN040 QNH3005INS T22/0120Z
ET08/0113Z LIMITED METWATCH 0113 TIL 0410=ÿ
PC 20
PC 11
Ownship lat: N30°24.01, long: W086°37.42
ID 8
Ownship lat: N30°24.01, long: W086°37.42
ID 8
ID 413 TAF KNBC 0109/0209 VRB03KT 1600 BR FEW005 BKN025 OVC050 QNH3010INS ETEMPO 0109/0113 0800 FG EBECMG 0112/0114 18008KT 9999 NSW SCT010 BKN030 OVC050 QNH3006INS ETEMPO 0200/0206 8000 -SHRA T11/0109Z T20/0121Z=ÿ
PC 20
Ownship lat: N30°24.01, long: W086°37.42
ID 413 METAR KAUO 011615Z AUTO 16011G21KT 10SM BKN012 BKN017 OVC055 16/14 DA2999 RMK AO1 LTG DSNT W=ÿB
ID 413 METAR KDHN 011553Z 17019G28KT 10SM SCT019 BKN065 20/15 A3007 RMK AO2 DPK WND 16029/1539 SLP178 T02000150=ÿ
PC 20
PC 11
Ownship lat: N30°24.01, long: W086°37.42
PC 20
PC 11
Ownship lat: N30°24.01, long: W086°37.42
ID 413 PIREP ATL 011555Z 47A UA /OV ATL010040/TM 1555/FL180/TP MD88/TA M10/IC LGT RIME 170-180/RM ZTL CWSU= ABQ /OV CIM/TM 1600/FL370/TP B738/TB MODERATE/RM ZAB ÿ
PC 20PC 11
Ownship lat: N30°24.01, long: W086°37.42
ID 413 METAR KLHW 011555Z AUTO 00000KT 10SM OVC044 15/15 A3019 RMK AO2 SLP223 FT01500150= ÿB
ID 413 METAR KNBC 011556Z AUTO 13004KT 10SM OVC065 20/15 A3020 RMK AO2 SLP226 T02000150 $=ÿ
ID 413 METAR KGAD 011615Z AUTO 18005KT 7SM FEW013 SCT046 OVC060 15/14 A2999 DRMK AO1 P0013=ÿ
ID 413 METAR KMAI 011553Z AUTO 16013G19KT 10SM SCT110 22/15 A3005 RMK AO2 DSLP175 T02170150=ÿB
ID 413 METAR KAQV 011556Z AUTO 36012G17KT 10SM BKN060 OVC080 12/M03 A3011 RMK AO2 SLP198 T01171033=ÿ
ID 413 METAR KPOE 011555Z AUTO 36013G23KT 10SM BKN055 OVC070 12/M04 A3010 RMK AO2 SLP198 T01221039=ÿ
ID 413 METAR KESF 011553Z AUTO 02009G17KT 340V050 10SM BKN055 12/M02 A3012 DRMK AO2 SLP200 T01171017=ÿ
ID 413 METAR KLIT 011553Z 32008KT 10SM OVC080 05/M05 A3020 RMK AO2 RAB16E26 DSLP227 P0000 T00501050 $=ÿ
ID 413 METAR KPBF 011553Z AUTO 34007KT 10SM OVC080 07/M04 A3018 RMK AO2 DRAB11E22 SLP217 P0000 T00671039=ÿ
ID 8
ID 413 METAR KNEW 011553Z AUTO 22012KT 3SM BR OVC006 21/20 A2995 RMK AO2 DRAE16 CIG 004V010 SLP136 P0001 T02110200 TSNO=ÿC
ID 413 PIREP BNA 011400Z BNA UA /OV BNA045041 /TM 1400 /FL045 /TP C680 /SK OVC045 /WX -RA /WV 23059KT /TB LGT /IC NEG /RM /TA UNKN ÿC
ID 413 PIREP BNA 011400Z BNA UA /OV BNA045041 /TM 1400 /FL045 /TP C680 /SK OVC045 /WX -RA /WV 23059KT /TB LGT /IC NEG /RM /TA UNKN ÿ
PC 20
PC 11
Ownship lat: N30°24.01, long: W086°37.42
ID 413 SPECI KMGE 011611Z AUTO 29010KT 10SM -DZ BKN009 OVC014 15/14 A3007 FRMK AO2 DZB1611 CIG 007V011 PRESRR SLP180 $=ÿ
ID 413 WINDS DRT 020000Z FT 3000 6000 F9000 C12000 G18000 C24000 C30000 D34000 39000 Y C0405 3605+01 2631+00 2632-03 2549-14 2567-25 257342 257951 248358 ÿ
ID 413 WINDS SHV 021200Z FT 3000 6000 F9000 C12000 G18000 C24000 C30000 D34000 39000 Y C3107 2918-03 2837-01 2741-05 2575-17 2593-26 259942 259951 741157 ÿ
ID 413 WINDS MEM 021200Z FT 3000 6000 F9000 C12000 G18000 C24000 C30000 D34000 39000 Y C3113 2722-05 2638-04 2650-07 2474-19 7506-28 751842 752150 751555 ÿ