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history [2026/03/27 14:15] – pkovarhistory [2026/03/31 10:08] (current) – pkovar
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 ===== pNav History ===== ===== pNav History =====
  
-The pNav GPS receiver project began in 2013. My doctoral student, Ondrej Jakubov, proposed using a Witch Navigator for positioning the small satellite. The CubeSat project started at the Czech Technical University in Prague as a student initiative. The student planned to participate in the QB50[[https://cordis.europa.eu/project/id/284427/reporting]]  CubeSat constellation competition. I appreciated this initiative, as our university has launched a new aerospace study program in which I was responsible for teaching radio navigation and radio communication topics.+The pNav GPS receiver project began in 2013. My doctoral student, Ondrej Jakubov, proposed using a Witch Navigator for positioning the small satellite. He was one of the students who started student CubeSat project at the Czech Technical University in Prague. The student planned to participate in the QB50[[https://cordis.europa.eu/project/id/284427/reporting]] CubeSat constellation competition. I appreciated this initiative, as our university has launched a new aerospace study program in which I was responsible for teaching radio navigation and radio communication topics.
  
-Unfortunately, we have not received any support for the satellite project, and the student team has consequently disbanded. There are only two people left, Jaroslav Laifer and me. We continue with a CubeSat project at our own expense. The project has resulted in the successful launch of the Lucky 7 CubeSat in June 2019.   +Unfortunately, we have not received any support for the project, and the student team has consequently disbanded. There are only two people left, Jaroslav Laifer and me. We continue with a CubeSat project at our own expense. The project has resulted in the successful launch of the Lucky 7 CubeSat in June 2019.   
  
 ==== pNav is not a Witch Navigator ==== ==== pNav is not a Witch Navigator ====
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 At that time, I had defined the following high-level requirements on the new navigation receiver for a CubeSat that I respected for all years of development of the pNav receiver: At that time, I had defined the following high-level requirements on the new navigation receiver for a CubeSat that I respected for all years of development of the pNav receiver:
  
-  * The CubeSat navigation receiver should be as simple as possible and integrate all necessary parts for navigation in the LEO Orbit+  * The CubeSat navigation receiver should be as simple as possible. 
 +  * It should integrate all necessary parts for navigation in the LEO Orbit
   * It should be compatible with a 1U CubeSat platform, ie, power consumption should be a fraction of the power budget of 1U satellite. The receiver should be small and light.      * It should be compatible with a 1U CubeSat platform, ie, power consumption should be a fraction of the power budget of 1U satellite. The receiver should be small and light.   
   * The applied signal and measurement processing algorithms should be simple and very robust   * The applied signal and measurement processing algorithms should be simple and very robust
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 ==== pNav Milestones ==== ==== pNav Milestones ====
  
-pNav receiver was developed from the beginning as a private and private founding project at my private laboratory in our house. +pNav receiver was developed from the beginning as a private, and private founding project at my private laboratory in our house. 
 The receiver is marketed by the company SkyFox of Jaroslav Laifr.  The receiver is marketed by the company SkyFox of Jaroslav Laifr. 
  
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   * **2018: Buying a implementation of a GPS software simulator ReGen** by IPSolutios.   * **2018: Buying a implementation of a GPS software simulator ReGen** by IPSolutios.
 +  
 +  * **2021: New Acquisition Unit ** that can operate in parallel with the correlators has been developed. It required a larger FPGA, which was incompatible with pNav's manufacturing capability.   
      
   * **2022: Application of the orbital position propagator** with the aim of overcoming GPS position dropout and improving the receiver reacquisition.    * **2022: Application of the orbital position propagator** with the aim of overcoming GPS position dropout and improving the receiver reacquisition. 
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   * **2026: Introduction of [[Start|pNav2]]**   * **2026: Introduction of [[Start|pNav2]]**
  
-<columns 40% 100% - ->+<columns 100% 50% - ->
  
 === Strenans === === Strenans ===
  
-  * **Long lifetime** in LEO thanks to the conservative design and selection of the components+  * **Long lifetime** in LEO thanks to the conservative design and conservative selection of the components
   * **Matured design **   * **Matured design **
   * **Heritage** in Laucy 7 CubeSat and satellites of our customers   * **Heritage** in Laucy 7 CubeSat and satellites of our customers
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 === Weekness === === Weekness ===
  
-  * **Problematic acquisition and reaqusition** due to the low performance signal processor. The receiver reaquisition in the ideal case lasts tens of minutes.+  * **Problematic acquisition and reaqusition** due to the low performance signal processor. The receiver reaquisition in the ideal case lasts tens of minutes 
 +  * **Non-configurable NMEA protocol**
  
 </columns> </columns>
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 ==== Conclusion ==== ==== Conclusion ====
  
-Further development of pNav is not possible without upgrading the acquisition unit, which will work in parallel with GPS correlators.+Further development of pNav is not possible without upgrading the acquisition unit, which will work in parallel with GPS correlators. 
  
  
history.1774617350.txt.gz · Last modified: by pkovar
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