Mode-S Receiver - Revision history

71.198.73.202: hardware changes

2012-11-04T20:05:17Z

hardware changes

← Older revision		Revision as of 13:05, 4 November 2012
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	* [[User:jbm\|jbm]] has been helping make bunny work		* [[User:jbm\|jbm]] has been helping make bunny work
	* [http://spench.net/ Balint] has been contributing motivation and has vast radio knowledge whenever he's in town		* [http://spench.net/ Balint] has been contributing motivation and has vast radio knowledge whenever he's in town
	* [[User:jmhayes\|jmhayes]] donated the ~~microADS-B~~ decoder and a lot of knowledge		* [[User:jmhayes\|jmhayes]] donated the Bullion decoder, ronin and a lot of knowledge

Adi at 22:20, 3 November 2012

2012-11-03T22:20:43Z

← Older revision		Revision as of 15:20, 3 November 2012
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	==What's at 2169==		==What's at 2169==

			[http://ronin.noise/VirtualRadar/GoogleMap.htm ronin.noise current data]

	[[User:Mid\|mid]] and Balint installed an antenna tuned for 1090MHz on the noisebridge antenna masts. It runs to [[bunny]], a Geode LX800 motherboard with a [http://www.microadsb.com/ microADS-B] PIC decoder inside a NMEA/IP-67-rated weatherproof can powered over fake-PoE. It's running Voyage Linux, why not. In testing, it has been able to follow aircraft over 150 miles away (we picked up the Aeroflot flight from LAX to Moscow on the other side of the Sierra last weekend, as well as flights en route over Paso Robles).		[[User:Mid\|mid]] and Balint installed an antenna tuned for 1090MHz on the noisebridge antenna masts. It runs to [[bunny]], a Geode LX800 motherboard with a [http://www.microadsb.com/ microADS-B] PIC decoder inside a NMEA/IP-67-rated weatherproof can powered over fake-PoE. It's running Voyage Linux, why not. In testing, it has been able to follow aircraft over 150 miles away (we picked up the Aeroflot flight from LAX to Moscow on the other side of the Sierra last weekend, as well as flights en route over Paso Robles).

Adi: one-line Mode S for noobs

2012-04-04T01:22:16Z

one-line Mode S for noobs

← Older revision		Revision as of 18:22, 3 April 2012
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			== WTF is Mode-S? ==

	~~== WTF is~~ Mode-S~~? ==~~		Mode-S is how airplanes tell radar who and where they are. (The radar echo is also used, but obviously doesn't give tail number.)

	Mode-S is the radio protocol used for secondary surveillance radar in the United States and most of the world. It is a direct descendent of Mode-A/C, which were originally used to add simple supplemental data to the primary radar returns on air traffic controllers' displays (like altitude and assigned squawk code). It is not literally RADAR, but it is a data protocol on a separate frequency (1090MHz), with equipment generally co-located with primary surveillance radar systems (often 1030MHz). In Europe now and the US eventually, a new higher-level protocol, ADS-B, is being implemented on-top of Mode-S. ADS-B allows for more sophisticated two-way data transfer data between ground stations and equipped aircraft. Right now in the US, most aircraft only transmit Mode-S, but any flight going to Europe generally supports ADS-B. Most importantly, ADS-B-equipped aircraft generally transmit their location, so that aircraft can be tracked by anyone within line of sight, instead of relying on primary radar returns. (The US is eager to move to ADS-B, as it means they can get rid of those hundreds (thousands?) of secondary surveillance radar stations they have to maintain across the US territories, and replace them with very simple systems not dissimilar to that described here! Also note that the US will also support ADS-B implementation via the UAT datalink instead of "1090ES"; this is a different thing and isn't covered by this project.)		Mode-S is the radio protocol used for secondary surveillance radar in the United States and most of the world. It is a direct descendent of Mode-A/C, which were originally used to add simple supplemental data to the primary radar returns on air traffic controllers' displays (like altitude and assigned squawk code). It is not literally RADAR, but it is a data protocol on a separate frequency (1090MHz), with equipment generally co-located with primary surveillance radar systems (often 1030MHz). In Europe now and the US eventually, a new higher-level protocol, ADS-B, is being implemented on-top of Mode-S. ADS-B allows for more sophisticated two-way data transfer data between ground stations and equipped aircraft. Right now in the US, most aircraft only transmit Mode-S, but any flight going to Europe generally supports ADS-B. Most importantly, ADS-B-equipped aircraft generally transmit their location, so that aircraft can be tracked by anyone within line of sight, instead of relying on primary radar returns. (The US is eager to move to ADS-B, as it means they can get rid of those hundreds (thousands?) of secondary surveillance radar stations they have to maintain across the US territories, and replace them with very simple systems not dissimilar to that described here! Also note that the US will also support ADS-B implementation via the UAT datalink instead of "1090ES"; this is a different thing and isn't covered by this project.)

Jmhayes: /* People */

2011-10-03T18:09:30Z

People

← Older revision		Revision as of 11:09, 3 October 2011
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	* [[User:jbm\|jbm]] has been helping make bunny work		* [[User:jbm\|jbm]] has been helping make bunny work
	* [http://spench.net/ Balint] has been contributing motivation and has vast radio knowledge whenever he's in town		* [http://spench.net/ Balint] has been contributing motivation and has vast radio knowledge whenever he's in town
	* [[User:jmhayes\|jmhayes] donated the microADS-B decoder and a lot of knowledge		* [[User:jmhayes\|jmhayes]] donated the microADS-B decoder and a lot of knowledge

Jmhayes: /* People */

2011-10-03T18:09:11Z

People

← Older revision		Revision as of 11:09, 3 October 2011
Line 28:		Line 28:
	* [[User:jbm\|jbm]] has been helping make bunny work		* [[User:jbm\|jbm]] has been helping make bunny work
	* [http://spench.net/ Balint] has been contributing motivation and has vast radio knowledge whenever he's in town		* [http://spench.net/ Balint] has been contributing motivation and has vast radio knowledge whenever he's in town
	* ~~Jordan~~ donated the microADS-B decoder and a lot of knowledge		* [[User:jmhayes\|jmhayes] donated the microADS-B decoder and a lot of knowledge

Mid at 17:42, 3 October 2011

2011-10-03T17:42:31Z

← Older revision		Revision as of 10:42, 3 October 2011
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	== WTF is Mode-S? ==		== WTF is Mode-S? ==
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	* Provide a freely-usable timestamped stream of data in the "port 30003" protocol used by most of the rest of the ADS-B hobbyist community		* Provide a freely-usable timestamped stream of data in the "port 30003" protocol used by most of the rest of the ADS-B hobbyist community
	* Contribute the stream to the [http://planefinder.net planefinder.net] community to increase coverage of the bay area
	* Put up a fun slippy map display		* Put up a fun slippy map display
	* Pool data with other bay area hobbyists to try to do real-time multilateration on aircraft that only transmit non-positional Mode-S data		* Pool data with other bay area hobbyists to try to do real-time multilateration on aircraft that only transmit non-positional Mode-S data
			* Provide archive of data for analysis by anyone who wants to. The sorts of queries people generally want to do are fast and the data is mostly schemaless, so hadoop/EMR is probably the best way to go.

	==People==		==People==

174.129.251.240: /* People */

2011-10-03T17:38:29Z

People

← Older revision		Revision as of 10:38, 3 October 2011
Line 29:		Line 29:
	* [[User:jbm\|jbm]] has been helping make bunny work		* [[User:jbm\|jbm]] has been helping make bunny work
	* [http://spench.net/ Balint] has been contributing motivation and has vast radio knowledge whenever he's in town		* [http://spench.net/ Balint] has been contributing motivation and has vast radio knowledge whenever he's in town
			* Jordan donated the microADS-B decoder and a lot of knowledge

174.129.251.240: /* What's at 2169 */

2011-10-03T17:37:43Z

What's at 2169

← Older revision		Revision as of 10:37, 3 October 2011
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	[[User:Mid\|mid]] and Balint installed an antenna tuned for 1090MHz on the noisebridge antenna masts. It runs to [[bunny]], a Geode LX800 motherboard with a [http://www.microadsb.com/ microADS-B] PIC decoder inside a NMEA/IP-67-rated weatherproof can powered over fake-PoE. It's running Voyage Linux, why not. In testing, it has been able to follow aircraft over 150 miles away (we picked up the Aeroflot flight from LAX to Moscow on the other side of the Sierra last weekend, as well as flights en route over Paso Robles).		[[User:Mid\|mid]] and Balint installed an antenna tuned for 1090MHz on the noisebridge antenna masts. It runs to [[bunny]], a Geode LX800 motherboard with a [http://www.microadsb.com/ microADS-B] PIC decoder inside a NMEA/IP-67-rated weatherproof can powered over fake-PoE. It's running Voyage Linux, why not. In testing, it has been able to follow aircraft over 150 miles away (we picked up the Aeroflot flight from LAX to Moscow on the other side of the Sierra last weekend, as well as flights en route over Paso Robles).

	~~Currently it is not operational due~~ to ~~interference issues between~~ the ~~motherboard~~ and the ~~PIC (~~and ~~perhaps a host of other problems)~~. ~~[[User~~:~~Mid\|mid]]~~, ~~[[User:jbm\|jbm]]~~, ~~and Balint have a plan~~! ~~It likely involves aluminium foil and gobs more electrical tape. Also the mounting+cabling is a crime~~ against ~~engineering—we'll fix it ASAP.~~		Things were delayed for a while since we needed a bigger box on the masts to hold the Mode-S decoder. But this has been solved, and we're now ready to put the decoder in place and start sharing bits. The plan is to offer the data up in several different ways:
			* via "port 30003" protocol, probably via PlanePlotter running under Wine on an Atom board downstairs
			* to the MLAT PlanePlotter world via UDP (this network uses the timing of Mode-S packets to determine aircraft positions instead of ADS-B inside the Mode-S, very cool!)
			* via logfiles posted every 5min to S3, for running hadoop/EMR jobs against

	==Long-term plan==		==Long-term plan==

Mid: /* WTF is Mode-S? */

2011-07-06T06:53:13Z

WTF is Mode-S?

← Older revision		Revision as of 23:53, 5 July 2011
Line 3:		Line 3:
	== WTF is Mode-S? ==		== WTF is Mode-S? ==

	Mode-S is the radio protocol used for secondary surveillance radar in the United States and most of the world. It is a direct descendent of Mode-A/C, which were originally used to add simple supplemental data to the primary radar returns on air traffic controllers' displays (like altitude and assigned squawk code). It is not literally RADAR, but it is a data protocol on a separate frequency (1090MHz), with by equipment generally co-located with primary surveillance radar systems (often 1030MHz). In Europe now and the US eventually, a new higher-level protocol, ADS-B, is being implemented on-top of Mode-S. ADS-B allows for more sophisticated two-way data transfer data between ground stations and equipped aircraft. Right now in the US, most aircraft only transmit Mode-S, but any flight going to Europe generally supports ADS-B. Most importantly, ADS-B-equipped aircraft generally transmit their location, so that aircraft can be tracked by anyone within line of sight, instead of relying on primary radar returns. (The US is eager to move to ADS-B, as it means they can get rid of those hundreds (thousands?) of secondary surveillance radar stations they have to maintain across the US territories, and replace them with very simple systems not dissimilar to that described here! Also note that the US will also support ADS-B implementation via the ~~UMT~~ datalink instead of "1090ES"; this is a different thing and isn't covered by this project.)		Mode-S is the radio protocol used for secondary surveillance radar in the United States and most of the world. It is a direct descendent of Mode-A/C, which were originally used to add simple supplemental data to the primary radar returns on air traffic controllers' displays (like altitude and assigned squawk code). It is not literally RADAR, but it is a data protocol on a separate frequency (1090MHz), with equipment generally co-located with primary surveillance radar systems (often 1030MHz). In Europe now and the US eventually, a new higher-level protocol, ADS-B, is being implemented on-top of Mode-S. ADS-B allows for more sophisticated two-way data transfer data between ground stations and equipped aircraft. Right now in the US, most aircraft only transmit Mode-S, but any flight going to Europe generally supports ADS-B. Most importantly, ADS-B-equipped aircraft generally transmit their location, so that aircraft can be tracked by anyone within line of sight, instead of relying on primary radar returns. (The US is eager to move to ADS-B, as it means they can get rid of those hundreds (thousands?) of secondary surveillance radar stations they have to maintain across the US territories, and replace them with very simple systems not dissimilar to that described here! Also note that the US will also support ADS-B implementation via the UAT datalink instead of "1090ES"; this is a different thing and isn't covered by this project.)

	* [http://en.wikipedia.org/wiki/ADS-B ADS-B]		* [http://en.wikipedia.org/wiki/ADS-B ADS-B]

Mid: /* What's at 2169 */

2011-07-06T00:59:04Z

What's at 2169

← Older revision		Revision as of 17:59, 5 July 2011
Line 10:		Line 10:
	==What's at 2169==		==What's at 2169==

	[[User:Mid\|mid]] and Balint installed an antenna tuned for 1090MHz on the noisebridge antenna masts. It runs to [[bunny]], a Geode LX800 motherboard with a [http://www.microadsb.com/ microADS-B] PIC decoder inside a NMEA/IP-67-rated weatherproof can powered over fake-PoE. It's running Voyage Linux, why not. In testing, it has been able to follow aircraft over 150 miles away (we picked up the Aeroflot ~~A330~~ from LAX to Moscow on the other side of the Sierra last weekend, as well as flights en route over Paso Robles).		[[User:Mid\|mid]] and Balint installed an antenna tuned for 1090MHz on the noisebridge antenna masts. It runs to [[bunny]], a Geode LX800 motherboard with a [http://www.microadsb.com/ microADS-B] PIC decoder inside a NMEA/IP-67-rated weatherproof can powered over fake-PoE. It's running Voyage Linux, why not. In testing, it has been able to follow aircraft over 150 miles away (we picked up the Aeroflot flight from LAX to Moscow on the other side of the Sierra last weekend, as well as flights en route over Paso Robles).

	Currently it is not operational due to interference issues between the motherboard and the PIC (and perhaps a host of other problems). [[User:Mid\|mid]], [[User:jbm\|jbm]], and Balint have a plan! It likely involves aluminium foil and gobs more electrical tape. Also the mounting+cabling is a crime against engineering—we'll fix it ASAP.		Currently it is not operational due to interference issues between the motherboard and the PIC (and perhaps a host of other problems). [[User:Mid\|mid]], [[User:jbm\|jbm]], and Balint have a plan! It likely involves aluminium foil and gobs more electrical tape. Also the mounting+cabling is a crime against engineering—we'll fix it ASAP.