844-812-7393 sales@polarisRDF.com

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USE THE REVOLUTIONARY NEW INTELLIGENT RADIO DIRECTION FINDER (IRDF)

POLARIS RDF PRODUCTS

Polaris RDF is an intelligent radio direction finder manufacturing company that offers radio detection finders (RDF) for search & rescue, law enforcement, military, and other government organizations. We are locally owned and operated in Dana Point, California. Our radio detection finders send electric waves that can penetrate fog and can be transmitted over a larger distance than light and sound waves. This allows radio detection finders to identify where the signal is being transmitted bearing an accuracy of 2.5-5 degrees on the GPS locating map. Polaris RDF can supply government organizations with RDF products that have been integrated with Android technology.

121.5 MHz & 406 MHz Beacons

121.5 MHz beacons are ground station dependent for civilians, also referred to as an International Air Distress signal. The 121.5 MHz frequency detector was designed to assist first responders to locate the distress signal quickly and efficiently for hikers, skiers, hunters, and the like. With global coverage, Polaris 406 MHz beacons send out a satellite transmission that is a digital, coded signal. The satellites then process the data to determine the location of the transmission.

FCC Synopsis

On November 9, 2018, the FCC released their FOURTH REPORT AND ORDER on the eventual transition from the existing 121.1 MHz Emergency Locator Transmitter (ELT) to a newer, 406 MHz version. This long document boils down to this: 406 MHz ELT’s are coming, butexisting 121.5 MHz ELTs may still be used until November 6, 2026.  Read the FCC Synopsis HERE.

Community Grant

For all organizations interested in purchasing a 121.5 radio direction finder, Walmart offers your organization the ability to apply for a Community Grant. Organizations must submit an online application to be considered for funding.  The 2018 application grant cycle begins on Jan. 1, 2018 and ends on Dec. 31, 2018. For more details and information on how to apply for a community grant visit our Grant Page HERE.

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  • Let us help you acquire these devices using grants from FEMA and Walmart
  • Technology report by the Pentagon.
  • 3.5 lbs handheld device
  • Adaptable for airborne and ground vehicles
  • Used by LEO, Fire agencies, Military, CBP and others

Android Smartphone with proprietary targeting and mapping software with networked results to both other ground teams and aircraft on the mission

121.5/406 MHz

Receiver

406 MHz

Receiver

121.5 MHz

Receiver

HOW IT WORKS

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Why 121.5 MHz Will Always Be Needed

Why 121.5 MHz Will Always Be Needed

The 121.5 MHz frequency for alerting to the Cospas-Sarsat satellites was phased out completely on the 1st of February in 2009.  The decision to do this was approved in February 1999 with a 10-year phase-out period.  Cospas-Sarsat does not require 121.5 MHz homing on any 406 MHz beacon. Individual member nations have put into place regulations requiring any 406 beacon (ELT, PLB, or EPIRB) sold, manufactured or used in that country to have a 121.5 MHz homer.  The following countries have major beacon manufactures who are all Cospas-Sarsat member nations and they all have regulations requiring 121.5 homing on all beacons. The USA, Australia, Canada, The UK, The European Union, China, and Russia.

The majority of these countries national regulations require the 121.5 MHz homer to have a signal strength of 50-100 mW.  The primary exception to this is the US, which requires all PLBs sold in the US to have a maximum 25 mW homer while ELTs and EPIRBs remain at 100mW. This means for ground search scenarios, TrueNorth Rescue Inc. has ensured that our Polaris RDF has enough sensitivity to pick up the weaker 25 mW homing transmission at the greatest range being 25 miles line of sight.

A lesser known fact about all Cospas-Sarsat 406 MHz beacons including commercial is that the GPS accuracy associated with these beacons is 100 meters.  Cospas-Sarsat knowingly cut short the GPS data string to equal 1 second of 1 degree of Latitude, or, 100 meters on average due to other data requirements.  As people typically don’t get in trouble in wide open areas, 100 meters can be a lot of territory to cover.  This is especially true in mountainous regions, heavily forested areas, and at sea during the night with less than optimal search conditions.  Therefore, even with GPS, the need for a 121.5 MHz homer is still critical to go that last 100 meters when time is of the essence.

One last factor related to GPS on 406 MHz beacons is that unlike the more capable handheld GPS units available that can receive and report a GPS position very reliably, a beacon (PLB, EPIRB or ELT) is designed foremost to get an emergency satellite signal out. Although a standalone GPS unit can get a position fix with one or two GPS satellites in view, a beacon normally requires three to four GPS satellites in view at the same time to acquire a fix. This clearly shows that the GPS functionality is secondary to the alerting function for beacons. Because in scenarios where there is a restricted view of the sky the GPS on the beacon may not acquire a fix.  This reduces the position accuracy from a GPS-aided 100 meters to a Doppler calculated 1.5 miles on average.

 

 

 

Why 121.5 MHz Will Always Be Needed

Why 121.5 MHz Will Always Be Needed

The 121.5 MHz frequency for alerting to the Cospas-Sarsat satellites was phased out completely on the 1st of February in 2009.  The decision to do this was approved in February 1999 with a 10-year phase-out period.  Cospas-Sarsat does not require 121.5 MHz homing on any 406 MHz beacon. Individual member nations have put into place regulations requiring any 406 beacon (ELT, PLB, or EPIRB) sold, manufactured or used in that country to have a 121.5 MHz homer.  The following countries have major beacon manufactures who are all Cospas-Sarsat member nations and they all have regulations requiring 121.5 homing on all beacons. The USA, Australia, Canada, The UK, The European Union, China, and Russia.

The majority of these countries national regulations require the 121.5 MHz homer to have a signal strength of 50-100 mW.  The primary exception to this is the US, which requires all PLBs sold in the US to have a maximum 25 mW homer while ELTs and EPIRBs remain at 100mW. This means for ground search scenarios, TrueNorth Rescue Inc. has ensured that our Polaris RDF has enough sensitivity to pick up the weaker 25 mW homing transmission at the greatest range being 25 miles line of sight.

A lesser known fact about all Cospas-Sarsat 406 MHz beacons including commercial is that the GPS accuracy associated with these beacons is 100 meters.  Cospas-Sarsat knowingly cut short the GPS data string to equal 1 second of 1 degree of Latitude, or, 100 meters on average due to other data requirements.  As people typically don’t get in trouble in wide open areas, 100 meters can be a lot of territory to cover.  This is especially true in mountainous regions, heavily forested areas, and at sea during the night with less than optimal search conditions.  Therefore, even with GPS, the need for a 121.5 MHz homer is still critical to go that last 100 meters when time is of the essence.

One last factor related to GPS on 406 MHz beacons is that unlike the more capable handheld GPS units available that can receive and report a GPS position very reliably, a beacon (PLB, EPIRB or ELT) is designed foremost to get an emergency satellite signal out. Although a standalone GPS unit can get a position fix with one or two GPS satellites in view, a beacon normally requires three to four GPS satellites in view at the same time to acquire a fix. This clearly shows that the GPS functionality is secondary to the alerting function for beacons. Because in scenarios where there is a restricted view of the sky the GPS on the beacon may not acquire a fix.  This reduces the position accuracy from a GPS-aided 100 meters to a Doppler calculated 1.5 miles on average.

 

 

 

Why 121.5 MHz Will Always Be Needed

Why 121.5 MHz Will Always Be Needed

The 121.5 MHz frequency for alerting to the Cospas-Sarsat satellites was phased out completely on the 1st of February in 2009.  The decision to do this was approved in February 1999 with a 10-year phase-out period.  Cospas-Sarsat does not require 121.5 MHz homing on any 406 MHz beacon. Individual member nations have put into place regulations requiring any 406 beacon (ELT, PLB, or EPIRB) sold, manufactured or used in that country to have a 121.5 MHz homer.  The following countries have major beacon manufactures who are all Cospas-Sarsat member nations and they all have regulations requiring 121.5 homing on all beacons. The USA, Australia, Canada, The UK, The European Union, China, and Russia.

The majority of these countries national regulations require the 121.5 MHz homer to have a signal strength of 50-100 mW.  The primary exception to this is the US, which requires all PLBs sold in the US to have a maximum 25 mW homer while ELTs and EPIRBs remain at 100mW. This means for ground search scenarios, TrueNorth Rescue Inc. has ensured that our Polaris RDF has enough sensitivity to pick up the weaker 25 mW homing transmission at the greatest range being 25 miles line of sight.

A lesser known fact about all Cospas-Sarsat 406 MHz beacons including commercial is that the GPS accuracy associated with these beacons is 100 meters.  Cospas-Sarsat knowingly cut short the GPS data string to equal 1 second of 1 degree of Latitude, or, 100 meters on average due to other data requirements.  As people typically don’t get in trouble in wide open areas, 100 meters can be a lot of territory to cover.  This is especially true in mountainous regions, heavily forested areas, and at sea during the night with less than optimal search conditions.  Therefore, even with GPS, the need for a 121.5 MHz homer is still critical to go that last 100 meters when time is of the essence.

One last factor related to GPS on 406 MHz beacons is that unlike the more capable handheld GPS units available that can receive and report a GPS position very reliably, a beacon (PLB, EPIRB or ELT) is designed foremost to get an emergency satellite signal out. Although a standalone GPS unit can get a position fix with one or two GPS satellites in view, a beacon normally requires three to four GPS satellites in view at the same time to acquire a fix. This clearly shows that the GPS functionality is secondary to the alerting function for beacons. Because in scenarios where there is a restricted view of the sky the GPS on the beacon may not acquire a fix.  This reduces the position accuracy from a GPS-aided 100 meters to a Doppler calculated 1.5 miles on average.

 

 

 

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INTELLIGENT RDF POWERED BY YOUR ANDROID SMARTPHONE

No longer do search teams have to use a compass and map to determine the location of the transmitting beacon. The Polaris RDF radio direction finding software is a sophisticated field tested and hardened radio detection device using a GPS locating map for locating potential targets utilizing radio based 121.5 and 406 emergency beacons.

Android Phone Based Software

Our software for RDF is based off of the use of the android phone. Android phones are advantageous for our software system because of its effectiveness and simplicity.

Handheld or Drone Mounted Options

With handheld or drone mounted options, the RDF device is an easy-to-use, mobile system. Because of the mobility of the radio direction finder, it allows Search & Rescue, Law Enforcement, and Military teams to ensure quicker response times.

GPS Location Mapping

Polaris RDF Android software system is a sophisticated, field tested, hardened device that utilizes radio-based emergency beacons using the GPS locating mapping system.

Network Capable

By using your local network, our software is capable of accomplishing the emergency tasks your government agency or organization requires in a time efficient manner.

10-Hr Battery Life (AA Batteries)

Our RDF system can last up to 10 hours on a pair of AA batteries.

We are a radio direction finding manufacturing company with a professional and innovative approach to assist your department with its RDF needs. Please call 1-844-812-7393 to speak with an expert about any inquiry regarding our RDF products. If you’d like to learn more about the Polaris 121 download our brochure.