| Both sides previous revisionPrevious revisionNext revision | Previous revision |
| guides:gps_modules [2014/11/06 21:28] – upu | guides:gps_modules [2016/09/05 05:57] (current) – upu |
|---|
| |
| * At present there are 3 GPS Modules that are regularly used by UKHAS balloon flights. These modules use an AND statement rather than OR for their [[http://en.wikipedia.org/wiki/CoCom|COCOM limits]]. This allows them to be used in high altitude balloon flights as they continue to function above 18km (60,000ft) as long as it doesn't exceed 515 m/s (which our balloon/payloads hopefully don't!). | * At present there are 3 GPS Modules that are regularly used by UKHAS balloon flights. These modules use an AND statement rather than OR for their [[http://en.wikipedia.org/wiki/CoCom|COCOM limits]]. This allows them to be used in high altitude balloon flights as they continue to function above 18km (60,000ft) as long as it doesn't exceed 515 m/s (which our balloon/payloads hopefully don't!). |
| * [[guides:ublox6|uBlox 6/7/8 Based Modules]] - The uBlox 6/7/8 family are the newest GPS module in use. Its the successor to the uBLOX 5. A 50 channel GPS in a SMD package. It is rated up to 50,000 meters altitude in flight mode. Its an inexpensive module with good performance available from [[http://ava.upuaut.net/store|HAB Supplies]]. Also used in the Radionova M10382.Although surface mounted there are breakout boards available. | * [[guides:ublox6|uBlox 6/7/8 Based Modules]] - The uBlox 6/7/8 family are the newest GPS module in use. Its the successor to the uBLOX 5. A 50 channel GPS in a SMD package. It is rated up to 50,000 meters altitude in flight mode. Its an inexpensive module with good performance available from [[https://store.uputronics.com/index.php?route=product/search&search=max|Uputronics]]. Also used in the Radionova M10382.Although surface mounted there are breakout boards available. |
| * [[http://www.u-blox.com/en/gps-modules.html|Ublox 4/5]] - The ublox modules are more advanced then the Lassen IQ and have 20 or more channels and often are 4Hz, they also have additional technology so that they acquire locks much faster. Ublox GPS modules are surface mounted and so are often harder to work with but can be found on Gumstix GPSstix boards, [[http://www.sparkfun.com/commerce/product_info.php?products_id=8889|GS406]] from Sparkfun, the [[guides:falcom_fsa03|Falcom FSA03]], occasionally the development boards come up on ebay. Similarly to the Lassen, Ublox have their own binary protocol known as UBX but their modules also use NMEA. The uBlox 4 and 5 are now end of life and have been superseeded by the uBlox 6 based modules. | * [[http://www.u-blox.com/en/gps-modules.html|Ublox 4/5]] - The ublox modules are more advanced then the Lassen IQ and have 20 or more channels and often are 4Hz, they also have additional technology so that they acquire locks much faster. Ublox GPS modules are surface mounted and so are often harder to work with but can be found on Gumstix GPSstix boards, [[http://www.sparkfun.com/commerce/product_info.php?products_id=8889|GS406]] from Sparkfun, the [[guides:falcom_fsa03|Falcom FSA03]], occasionally the development boards come up on ebay. Similarly to the Lassen, Ublox have their own binary protocol known as UBX but their modules also use NMEA. The uBlox 4 and 5 are now end of life and have been superseeded by the uBlox 6 based modules. |
| * [[http://www.trimble.com/embeddedsystems/lasseniq.aspx?dtID=overview|Lassen IQ]] - The Timble Lassen IQ is a 12 channel 1Hz GPS module which is now end of life though still availble on E-Bay. It requires a breakout board of some form as the connector on the bottom is quite small. The module has been used in many flights and was the workhorse of UKHAS until superseeded by the uBlox chipset based modules. The Lassen IQ has 2 serial ports, the 1st by default sends data in a proprietary binary form TSIP while the 2nd transmits NMEA. | * [[http://www.trimble.com/embeddedsystems/lasseniq.aspx?dtID=overview|Lassen IQ]] - The Timble Lassen IQ is a 12 channel 1Hz GPS module which is now end of life though still availble on E-Bay. It requires a breakout board of some form as the connector on the bottom is quite small. The module has been used in many flights and was the workhorse of UKHAS until superseeded by the uBlox chipset based modules. The Lassen IQ has 2 serial ports, the 1st by default sends data in a proprietary binary form TSIP while the 2nd transmits NMEA. |
| ===== Known Problem GPSes ===== | ===== Known Problem GPSes ===== |
| |
| * [[guides:AdafruitUGPS|Adafruit Ultimate GPS]] - Most versions have a limit of 27km which isn't suitable for most HAB launches. We understand newer versions has a limit of 40km, one of the new firmware versions worked up to 38km. See article for more information. | * [[guides:AdafruitUGPS|Adafruit Ultimate GPS]] - Earlier versions have a limit of 27km which isn't suitable for most HAB launches. We understand newer versions has a limit of 40km, one of the new firmware versions worked up to 38km. See article for more information. |
| * SIRF III chipset - with original firmware, any GPS modules that have this chipset will freeze at 24km altitude, while they use AND instead of OR they don't appear to work above 24km. | * SIRF III chipset - with original firmware, any GPS modules that have this chipset will freeze at 24km altitude, while they use AND instead of OR they don't appear to work above 24km. |
| * GM862-GPS | * GM862-GPS |
