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GPS Demystified | Investigating the internals of the Global Positioning SystemInvestigating the internals of the Global Positioning System
http://gpsdemystified.wordpress.com/
Investigating the internals of the Global Positioning System
http://gpsdemystified.wordpress.com/
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GPS Demystified | Investigating the internals of the Global Positioning System | gpsdemystified.wordpress.com Reviews
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Investigating the internals of the Global Positioning System
hamsternz | GPS Demystified
https://gpsdemystified.wordpress.com/author/hamsternz
Investigating the internals of the Global Positioning System. Debugging GPS is hard. October 6, 2016. Debugging GPS is hard. There is very little external information or tools you can use to verify your work as you go. For my test data-set I am getting all space vehicles in the correct area of their orbits, and all time-stamps look to be correct. The solution to the ‘four unknowns’ also converges to a point – it is in the correct country, but the altitude is all wrong:. Splitting NAV frames into fields.
About | GPS Demystified
https://gpsdemystified.wordpress.com/about
Investigating the internals of the Global Positioning System. I am building my own Open Source GPS receiver. Maybe others might be interested in what I find, and the technology and techniques used. You can email me at hamster@snap.net.nz if you like. Blog at WordPress.com.
Splitting NAV frames into fields | GPS Demystified
https://gpsdemystified.wordpress.com/2016/09/24/splitting-nav-frames-into-fields
Investigating the internals of the Global Positioning System. Splitting NAV frames into fields. September 24, 2016. September 24, 2016. Pulling out the individual values out of the NAV frames, then converting them into the correct range of values is quite a struggle. Here is my solution! First off, here are a few worker routines that pull a range of bits out of the NAV subfields (where the parity bits are in the lowest 6 bits of each value):. This also extracts two sets of bits and concatenates them toge...
Correlation time! Come on! Lets correlate | GPS Demystified
https://gpsdemystified.wordpress.com/2016/09/15/correlation-time-come-on-lets-correlate
Investigating the internals of the Global Positioning System. September 15, 2016. September 15, 2016. Apologies to K. C. and the Sunshine band). The process can be quite easily described:. Stretch the 1023-bit Gold code of the Space Vehicle to match the number of samples per millisecond of the incoming data stream. Sum up the I and Q streams for a sensible period of time (usually a multiple of length of time it takes to transmit a Gold code. These two numbers will indicate how much signal is in phase...
Calculating orbits | GPS Demystified
https://gpsdemystified.wordpress.com/2016/09/24/calculating-orbits
Investigating the internals of the Global Positioning System. September 24, 2016. September 24, 2016. Once you have acquired a GPS Space Vehicle, you are than faced with the daunting task of calculating where it is at any given instant. NAV frames 2 and 3 provide information about the orbit, and NAV frame 1 provides information about the time. Using the following untested code it is possible to print out the Earth Centered, Earth Fixed location of the Space Vehicle at any given time.
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info | OpenDGPS
http://opendgps.de/author/qrios
Differential GPS for the rest of us. Skip to primary content. Skip to secondary content. Für einen GPS-Receiver braucht es nicht viel: eine RF-Einheit mit Antenne und 1,5 GHz, einen Wandler und einen Prozessor. Und dann muss man nur noch wissen, wie man aus den Daten auch die Informationen rausfiltert, die man sucht. Den Softwarepart hat sich der @field hamster. Vorgenommen. In seinem neuen Blog GPS DEMYSTIFIED. Kann, ohne einen Megaflop-Prozessor bemühen zu müssen. Die Masterarbeit eines Studenten (Mich...
Open Source | OpenDGPS
http://opendgps.de/category/open-source
Differential GPS for the rest of us. Skip to primary content. Skip to secondary content. Category Archives: Open Source. Für einen GPS-Receiver braucht es nicht viel: eine RF-Einheit mit Antenne und 1,5 GHz, einen Wandler und einen Prozessor. Und dann muss man nur noch wissen, wie man aus den Daten auch die Informationen rausfiltert, die man sucht. Den Softwarepart hat sich der @field hamster. Vorgenommen. In seinem neuen Blog GPS DEMYSTIFIED. Kann, ohne einen Megaflop-Prozessor bemühen zu müssen. Sieht ...
Background | OpenDGPS
http://opendgps.de/category/background
Differential GPS for the rest of us. Skip to primary content. Skip to secondary content. Für einen GPS-Receiver braucht es nicht viel: eine RF-Einheit mit Antenne und 1,5 GHz, einen Wandler und einen Prozessor. Und dann muss man nur noch wissen, wie man aus den Daten auch die Informationen rausfiltert, die man sucht. Den Softwarepart hat sich der @field hamster. Vorgenommen. In seinem neuen Blog GPS DEMYSTIFIED. Kann, ohne einen Megaflop-Prozessor bemühen zu müssen. Bei einem spontanen Gespräch mit einem...
Hardware | OpenDGPS
http://opendgps.de/category/hardware
Differential GPS for the rest of us. Skip to primary content. Skip to secondary content. Für einen GPS-Receiver braucht es nicht viel: eine RF-Einheit mit Antenne und 1,5 GHz, einen Wandler und einen Prozessor. Und dann muss man nur noch wissen, wie man aus den Daten auch die Informationen rausfiltert, die man sucht. Den Softwarepart hat sich der @field hamster. Vorgenommen. In seinem neuen Blog GPS DEMYSTIFIED. Kann, ohne einen Megaflop-Prozessor bemühen zu müssen. Die Masterarbeit eines Studenten (Mich...
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Top 10 Running GPS Units. Top 10 Vehicle GPS. Top 10 Handheld GPS. Garmin nuvi 40 vs 40LM. May 23, 2012. Compare the difference features between Garmin nuvi 40 and 40LM. Overview Garmin Approach S3 for Golfer. April 10, 2012. The following overview Garmin Approach S3 should help you to understand just why it is that this golf watch is claimed to have set a new benchmark for innovation. Featuring more than 27,000 courses,. Magellan RoadMate RV9145-LM 7 Inch GPS Navigator. March 30, 2012. TomTom biggest an...
GPS Demystified | Investigating the internals of the Global Positioning System
Investigating the internals of the Global Positioning System. Debugging GPS is hard. October 6, 2016. Debugging GPS is hard. There is very little external information or tools you can use to verify your work as you go. For my test data-set I am getting all space vehicles in the correct area of their orbits, and all time-stamps look to be correct. The solution to the ‘four unknowns’ also converges to a point – it is in the correct country, but the altitude is all wrong:. Splitting NAV frames into fields.
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