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What you are talking about is an impossibility and that is why it does not exist. It is impossible to determine bearing AND range from a single location when receiving a radio signal. You can determine bearing relative to your location but nut range. Range is affected by power output, antenna gain, path losses etc all or which are variable. Two stations can determine both range and location but with poor accuracy. It takes three stations to get the location localized. As far as AFTER the station has stopped transmitting, you can't detect something that does not exist.

There is a company, Motron, that makes transmitter fingerprinting software that works on a PC connected to a receiver. The software analyzes the first keyup pulse of a radio signal and can determine if the signal is coming from the same source transmitter or if there are various people doing the same thing. Even the FCC uses it to determine if the transmitter they are monitoring is in fact the same one they monitored earlier. Note that this software does NOT locate but will IDENTIFY if it is in fact the target transmitter being looked for.

http://www.google.ca/url?sa=t&source=web&cd=3&ved=0CDoQFjAC&url=http%3A%2F%2Fciteseerx.ist.psu.edu%2Fviewdoc%2Fdownload%3Fdoi%3D10.1.1.38.9893%26rep%3Drep1%26type%3Dpdf&rct=j&q=MoTron%20TxID&ei=kYuZTpCvHOTN0AHOqvioBA&usg=AFQjCNEa6Uzp9eFmq0x9Di4nwsR2c-u-0A&cad=rja

<blockquote data-quote="Captain Kilowatt" data-source="post: 323694" data-attributes="member: 39">What you are talking about is an impossibility and that is why it does not exist. It is impossible to determine bearing AND range from a single location when receiving a radio signal. You can determine bearing relative to your location but nut range. Range is affected by power output, antenna gain, path losses etc all or which are variable. Two stations can determine both range and location but with poor accuracy. It takes three stations to get the location localized. As far as AFTER the station has stopped transmitting, you can&#039;t detect something that does not exist.There is a company, Motron, that makes transmitter fingerprinting software that works on a PC connected to a receiver. The software analyzes the first keyup pulse of a radio signal and can determine if the signal is coming from the same source transmitter or if there are various people doing the same thing. Even the FCC uses it to determine if the transmitter they are monitoring is in fact the same one they monitored earlier. Note that this software does NOT locate but will IDENTIFY if it is in fact the target transmitter being looked for.<a href="http://www.google.ca/url?sa=t&amp;source=web&amp;cd=3&amp;ved=0CDoQFjAC&amp;url=http%3A%2F%2Fciteseerx.ist.psu.edu%2Fviewdoc%2Fdownload%3Fdoi%3D10.1.1.38.9893%26rep%3Drep1%26type%3Dpdf&amp;rct=j&amp;q=MoTron%20TxID&amp;ei=kYuZTpCvHOTN0AHOqvioBA&amp;usg=AFQjCNEa6Uzp9eFmq0x9Di4nwsR2c-u-0A&amp;cad=rja" target="_blank">http://www.google.ca/url?sa=t&amp;source=web&amp;cd=3&amp;ved=0CDoQFjAC&amp;url=http%3A%2F%2Fciteseerx.ist.psu.edu%2Fviewdoc%2Fdownload%3Fdoi%3D10.1.1.38.9893%26rep%3Drep1%26type%3Dpdf&amp;rct=j&amp;q=MoTron%20TxID&amp;ei=kYuZTpCvHOTN0AHOqvioBA&amp;usg=AFQjCNEa6Uzp9eFmq0x9Di4nwsR2c-u-0A&amp;cad=rja</a></blockquote>

[QUOTE="Captain Kilowatt, post: 323694, member: 39"] What you are talking about is an impossibility and that is why it does not exist. It is impossible to determine bearing AND range from a single location when receiving a radio signal. You can determine bearing relative to your location but nut range. Range is affected by power output, antenna gain, path losses etc all or which are variable. Two stations can determine both range and location but with poor accuracy. It takes three stations to get the location localized. As far as AFTER the station has stopped transmitting, you can't detect something that does not exist. There is a company, Motron, that makes transmitter fingerprinting software that works on a PC connected to a receiver. The software analyzes the first keyup pulse of a radio signal and can determine if the signal is coming from the same source transmitter or if there are various people doing the same thing. Even the FCC uses it to determine if the transmitter they are monitoring is in fact the same one they monitored earlier. Note that this software does NOT locate but will IDENTIFY if it is in fact the target transmitter being looked for. [URL="http://www.google.ca/url?sa=t&source=web&cd=3&ved=0CDoQFjAC&url=http%3A%2F%2Fciteseerx.ist.psu.edu%2Fviewdoc%2Fdownload%3Fdoi%3D10.1.1.38.9893%26rep%3Drep1%26type%3Dpdf&rct=j&q=MoTron%20TxID&ei=kYuZTpCvHOTN0AHOqvioBA&usg=AFQjCNEa6Uzp9eFmq0x9Di4nwsR2c-u-0A&cad=rja"]http://www.google.ca/url?sa=t&source=web&cd=3&ved=0CDoQFjAC&url=http%3A%2F%2Fciteseerx.ist.psu.edu%2Fviewdoc%2Fdownload%3Fdoi%3D10.1.1.38.9893%26rep%3Drep1%26type%3Dpdf&rct=j&q=MoTron%20TxID&ei=kYuZTpCvHOTN0AHOqvioBA&usg=AFQjCNEa6Uzp9eFmq0x9Di4nwsR2c-u-0A&cad=rja[/URL] [/QUOTE]

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