![Page 1: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/1.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 1 reelektronika
Reelektronika’s IntegratedLoran-C/GPS/Eurofix receiver
- early test results
Dr. Arthur Helwig
Reelektronika, Netherlands
ILA 2003Boulder, Colorado, USA, 3-7 November 2003
Dr.ir.
![Page 2: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/2.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 2 reelektronika
PhD Arthur & Gerard, 13 Oct 2003
Thank you!
![Page 3: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/3.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 3 reelektronika
Marine trials
• Trials to assess an integrated GPS/Eurofix receiver
• Out of the Eckernförde harbor, using a small (30 ft) vessel
• Two trial runs:– 10/12 June 2003– 9/10 Oct 2003
• Third trial scheduled for January 2004
![Page 4: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/4.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 4 reelektronika
Measurement vessel
![Page 5: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/5.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 5 reelektronika
Measurement set-up• “Old version” Loradd receiver
Performs:- Bandpass filtering- Cross-rate filtering
Outputs:- Eurofix datalink information- Cleaned up pulses for every tracked Loran-C station
• PC running MatlabPerforms:
- ECD measurement- Cycle identification- Range calculation, using ASF and/or GPS calibration
Outputs:- Positions calculated in a number of modes
• NovAtel OEM4 GPS receiver• Laptop for display of data
![Page 6: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/6.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 6 reelektronika
Picture of set-up
![Page 7: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/7.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 7 reelektronika
Map of test area
![Page 8: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/8.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 8 reelektronika
NELS 100m coverage (95%)
Tests were performed at boundary of NELS coverage
![Page 9: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/9.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 9 reelektronika
Modes of position calculation
1. DGPS, SPS Radiobeacon mode
2. DPGS, SPS Eurofix mode
3. GPS, SPS mode
4. Loran-C, DGPS calibrated mode
5. Loran-C, ASF-table calibrated mode
6. Loran-C, stand-alone mode
7. Fix not available• Simultaneous output of selected modes• Automatic mode
![Page 10: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/10.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 10 reelektronika
Station availability
![Page 11: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/11.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 11 reelektronika
Tracked Loran-C stations
![Page 12: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/12.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 12 reelektronika
Modes of operation
![Page 13: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/13.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 13 reelektronika
Track plots
![Page 14: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/14.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 14 reelektronika
Sailing under a powerline
• Powerline approx. 75 meters high
• High voltage• No noticeable influence
on receiver performance
![Page 15: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/15.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 15 reelektronika
Early conclusions• Operational fully automatic receiver
– GPS– Autonomous Loran-C– ASF-corrected Loran-C– GPS-calibrated Loran-C
• Even under sub-optimal conditions, first track results look promising
• Work to be done:– Implement advanced RF interference mitigation (on-
ship power generator was suspect)– Implement of H-field antenna compensation– Check cycle ID / ECD measurement algorithms– Automatic station selection (to be used in position
calculation algorithm)
![Page 16: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/16.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 16 reelektronika
Tasks at handSignal Processor
77 x 51 mmWhen we…
• Finalise tracking & positioning code
• Port all software code to DSP board
• Finish antenna production
… we’ll have a functional small receiver in Q1 2004
![Page 17: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/17.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 17 reelektronika
Monitor set-up at
![Page 18: Reelektronika’s Integrated Loran-C/GPS/Eurofix receiver - early test results](https://reader035.vdocuments.mx/reader035/viewer/2022062408/568142bf550346895daf07da/html5/thumbnails/18.jpg)
Arthur Helwig, ILA 32, November 4-7, Boulder, CO 18 reelektronika
Demonstration