Download - Test of Seres receiver using EGNOS signal
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Test of Seres receiver using Test of Seres receiver using EGNOS signalEGNOS signal
Joanna Czapska
Warsaw University of Technology
Faculty of Geodesy and Cartography
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Seres receiverSeres receiver
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The Seres receiverThe Seres receiver
Uses a new GPS engineUses a new GPS engine
Cooperates with EGNOS, WAAS, Cooperates with EGNOS, WAAS, MSAS satellite systemsMSAS satellite systems
Two modes of operation:Two modes of operation:• With EGNOS correctionWith EGNOS correction• Without EGNOS correctionWithout EGNOS correction
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Description of the testDescription of the test
First part static surveying in WarsawFirst part static surveying in Warsaw• One measurement siteOne measurement site
Second part static surveying in Second part static surveying in JózefosławJózefosław• Four measurement sitesFour measurement sites
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Data received in the first partData received in the first part
Obtained ∆x, ∆y and ∆hObtained ∆x, ∆y and ∆h
From these calculated RFrom these calculated R22 and R and R33
222
3
222
hyxR
yxR
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Graph IGraph I
RR2 variation in time with EGNOS correction and without the correction
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Graph IIGraph II
RR3 variation in time with EGNOS correction and without the correction
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Comparison of average distances RComparison of average distances R22 and R and R33
Measurement R2 avg, /m/ R3 avg. /m/
With EGNOS 1,4384 3,0558
Without EGNOS 1,5884 3,0892
Difference 0,1500 0,0334
ResultsResults
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ResultsResults
Comparison of standard deviations RComparison of standard deviations R22 and R and R33
Measurement Std. Dev. for R2 avg, /m/
Std. Dev. for R3 avg, /m/
With EGNOS 0,8225 1,7201
Without EGNOS
0,9996 2,0057
Difference 0,1771 0,2856
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Comparison of σ-errors for RComparison of σ-errors for R2 2
(68%-σ, 95%-2σ, 99%-3σ)(68%-σ, 95%-2σ, 99%-3σ)
Surveing with EGNOS correctionSurveing with EGNOS correction Surveing without EGNOS correctionSurveing without EGNOS correction
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Comparison of σ-errors for RComparison of σ-errors for R22
σ 2σ 3σ
Radius value /m/
Measurement with EGNOS
1,7219 3,4500 5,0041
Radius value /m/
Measurement without EGNOS
1,8109 3,5263 6,9702
Difference 0,0890 0,0763 1,9661
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Comparison of σ-errors for RComparison of σ-errors for R33
σ 2σ 3σ
Radius value /m/
Measurement with EGNOS
3,0164 6,7479 10,1639
Radius value /m/
Measurement without EGNOS
3,5300 7,0505 16,8769
Difference 0,5136 0,3026 6,7130
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Results - SummaryResults - Summary
RR22 RR33
Influence of Influence of EGNOS correction EGNOS correction on the on the measurements. measurements. Calculated for (3σ)Calculated for (3σ)
28,2% 28,2% (better (better measurement measurement results with results with
EGNOS correction)EGNOS correction)
39,8% 39,8% (better (better measurement measurement results with results with
EGNOS correction)EGNOS correction)
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Data received in the second partData received in the second part Obtained geographical coordinates: B, L, H (four Obtained geographical coordinates: B, L, H (four
points A, B, C and D)points A, B, C and D)
Astrogeodetic Observatory in Józefosław
Astrogeodetic Obserwatory in Józefosław
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Comparison of σ-errors for RComparison of σ-errors for R22
Differences of the results with EGNOS and without Differences of the results with EGNOS and without EGNOS correctionEGNOS correction
σσ 2σ2σ 3σ3σ
Site ASite A 0,07110,0711 0,46770,4677 0,50830,5083
Site BSite B 0,01550,0155 -0,4611 -0,4611 (worse (worse measurement measurement results with results with EGNOS EGNOS correction)correction)
-0,4648 -0,4648 (worse (worse measurement measurement results with results with EGNOS EGNOS correction)correction)
Site CSite C 0,01610,0161 0,23900,2390 0,24410,2441
Site DSite D 0,21900,2190 2,10802,1080 2,16342,1634
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Comparison of σ-errors for RComparison of σ-errors for R33
Differences of the results with EGNOS and without Differences of the results with EGNOS and without EGNOS correctionEGNOS correction
σσ 2σ2σ 3σ3σ
Site ASite A 0,44180,4418 0,76430,7643 0,74770,7477
Site BSite B 0,00500,0050 0,07230,0723 0,12200,1220
Site CSite C 1,18071,1807 1,33071,3307 1,30971,3097
Site DSite D 0,35740,3574 3,39573,3957 3,48313,4831
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Results - Summary Results - Summary
Influence of EGNOS correction in percents. Influence of EGNOS correction in percents. Calculated for 3σCalculated for 3σ
R2R2 R3 R3
Site ASite A 41,5%41,5% 42,5%42,5%
Site BSite B -75,4%-75,4%(worse measurement result (worse measurement result with EGNOS correction)with EGNOS correction)
9,2%9,2%
Site CSite C 21,1%21,1% 53,2%53,2%
Site DSite D 72,5%72,5% 75,8%75,8%
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Site A coordinates obtained Site A coordinates obtained with EGNOS with EGNOS correctioncorrection and and without this correctionwithout this correction
Site A
-1,4
-1,2
-1
-0,8
-0,6
-0,4
-0,2
0
0,2
0,4
-0,6 -0,5 -0,4 -0,3 -0,2 -0,1 0 0,1 0,2 0,3
[m]
[m]
Without EGNOS
H=1,04 m
True coordinates
H=0,00 m
With EGNOS
H=0,70m
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Site B coordinates obtained Site B coordinates obtained with EGNOS with EGNOS correctioncorrection and and without this correctionwithout this correction
Site B
-1
-0,5
0
0,5
1
1,5
2
2,5
3
-1,3 -1,1 -0,9 -0,7 -0,5 -0,3 -0,1 0,1 0,3
[m]
[m]
Without EGNOS
H=0,89 m
True coordinates
H=0,00 m
With EGNOS
H=1,07m
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Site C coordinates obtained Site C coordinates obtained with EGNOS with EGNOS correctioncorrection and and without this correctionwithout this correction
-0,8
-0,6
-0,4
-0,2
0
0,2
0,4
-3,2 -2,7 -2,2 -1,7 -1,2 -0,7 -0,2 0,3
Site C
-0,8
-0,6
-0,4
-0,2
0
0,2
0,4
-3,2 -2,7 -2,2 -1,7 -1,2 -0,7 -0,2 0,3
[m]
[m]
Without EGNOS
H=0,68 m
True coordinates
H=0,00 m
With EGNOS
H=0,37m
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Site D coordinates obtained Site D coordinates obtained with EGNOS with EGNOS correctioncorrection and and without this correctionwithout this correction
Site D
-0,8
-0,6
-0,4
-0,2
0
0,2
0,4
-2,2 -1,7 -1,2 -0,7 -0,2 0,3
[m]
[m]
Without EGNOS
H=1,28 m
With EGNOS
H=1,01m
True coordinates
H=0,00 m
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ConclusionConclusion
EGNOS correction improves accuracy EGNOS correction improves accuracy of the measurements.of the measurements.
The Seres receiver has very fast The Seres receiver has very fast start-up and acquisition times.start-up and acquisition times.• It is very handy and easy to transport It is very handy and easy to transport • It is very easy to useIt is very easy to use
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Thank YouThank You Have a nice Have a nice
day.day.