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Reliability of CSRS-PPP for Validating the Egyptian Geodetic Cors Networks

Ashraf Abdallah
Ashraf Abdallah
 oraz 
Tarek Agag
Tarek Agag
   | 22 kwi 2022
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Data publikacji: 22 kwi 2022
Zakres stron: 58 - 76
Otrzymano: 21 paź 2020
Przyjęty: 04 mar 2022
DOI: https://doi.org/10.2478/arsa-2022-0004
Słowa kluczowe
© 2022 Ashraf Abdallah et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1.

Layout of ESA-CORS and HARN stations
Layout of ESA-CORS and HARN stations

Figure 2.

Design of global constrained network solution ©Google Earth: (a) ESA-CORS, (b) IGS-CORS
Design of global constrained network solution ©Google Earth: (a) ESA-CORS, (b) IGS-CORS

Figure 3.

Network solution
Network solution

Figure 4.

Processing schedule
Processing schedule

Figure 5.

Dual PPP errors for ESA-CORS: (a) for DOY 201, (b) for DOY 202, and (c) for DOY 203 (static mode)
Dual PPP errors for ESA-CORS: (a) for DOY 201, (b) for DOY 202, and (c) for DOY 203 (static mode)

Figure 6.

Dual PPP errors for ESA-CORS stations (epoch-wise mode)
Dual PPP errors for ESA-CORS stations (epoch-wise mode)

Figure 7.

Dual PPP errors for IGS-CORS: (a) for DOY 201, (b) for DOY 202, and (c) for DOY 203 (static mode)
Dual PPP errors for IGS-CORS: (a) for DOY 201, (b) for DOY 202, and (c) for DOY 203 (static mode)

Figure 8.

Dual PPP errors for IGS-CORS stations (epoch-wise mode)
Dual PPP errors for IGS-CORS stations (epoch-wise mode)

List of CORS

Station ID Latitude Longitude H Station ID Latitude Longitude H
ADFO N24°58′46.241″ E32°52′49.913″ 105.97 QANA N26°09′22.293″ E32°43′18.173″ 101.20
ADWH N28°41′41.549″ E30°46′01.677″ 64.61 QANT N30°51′27.105″ E32°18′36.257″ 34.11
ASHM N30°17′40.001″ E30°59′04.720″ 39.67 RMDN N30°17′26.508″ E31°44′23.437″ 149.50
AYAT N29°37′06.841″ E31°15′22.315″ 58.82 RSHD N31°24′19.102″ E30°25′17.957″ 36.85
BADR N30°34′57.049″ E30°42′37.032″ 47.94 SDAT N30°22′31.934″ E30°29′34.676″ 71.50
BLTM N31°33′11.924″ E31°05′40.480″ 30.37 SHKH N31°06′24.609″ E30°56′26.923″ 30.55
BNHA N30°28′15.304″ E31°10′45.118″ 46.02 SMLT N28°18′38.917″ E30°42′39.376″ 71.19
CARO N30°01′55.725″ E31°12′55.058″ 75.57 SUEF N29°04′53.755″ E31°05′30.069″ 60.47
DMNH N31°02′27.912″ E30°27′57.358″ 41.63 SUZE N29°59′18.836″ E32°31′19.498″ 47.13
ETSA N29°14′15.413″ E30°47′49.999″ 41.64 TANT N30°47′36.413″ E30°59′35.224″ 40.81
HMOL N31°18′35.684″ E31°09′02.195″ 44.08 THAT N26°46′09.649″ E31°29′50.601″ 87.69
ISML N30°36′15.307″ E32°18′00.940″ 43.27 TSHT N26°07′06.090″ E32°05′40.335″ 88.37
ISNA N25°17′20.274″ E32°33′28.518″ 102.49 WAKF N26°03′41.760″ E32°25′52.706″ 109.83
KBER N30°43′56.659″ E31°40′21.508″ 33.15 DYNG N38°04′42.788″ E23°55′56.765″ 510.56
LXOR N25°42′29.159″ E32°39′09.500″ 110.58 NICO N35°08′27.558″ E33°23′47.216″ 190.02
MNSH N26°29′00.621″ E31°47′39.230″ 96.24 NKLG N00°21′14.072″ E09°40′19.660″ 31.49
MNZL N31°09′36.216″ E31°56′04.274″ 36.95 NOT1 N36°52′33.049″ E14°59′23.246″ 126.35
MOUS N27°38′36.827″ E30°51′27.876″ 82.44 RAMO N30°35′51.388″ E34°45′47.314″ 886.84
MTMR N30°54′45.358″ E30°09′31.184″ 33.16 YKRO N06°52′14.023″ W05°14′24.327″ 270.26

Statistics of continuous lack of observation data for ESA-CORS

Station ID DOY 201 DOY 202 DOY 203 Station ID DOY 201 DOY 202 DOY 203
ADFO 4 h - - QANA 9 h 9 h 9 h
ADWH 1 h - - QANT 1 h - -
BLTM 6 h 12 h 8 h RMDN 3 h - -
DMNH 13 h 6 h 5 h THAT 1 h - -
ISNA 2 h - - TSHT 8 h - -
KBER 16 h 16 h 16 h WAKF 22 h - -
MNSH 1 h - -

Statistics of static-PPP solution for ESA-CORS in millimeters

DOY201 DOY202 DOY203 Overall mean values
E N h E N h E N h E N h
Max. 20.0 15.0 44.0 10.0 15.0 48.0 9.0 10.0 48.0 13.0 13.3 46.7
μ 6.5 4.2 18.5 6.0 4.6 17.4 4.3 4.2 17.6 5.6 4.3 17.8
Min. 0.0 1.0 0.0 1.0 0.0 0.0 0.0 0.0 0.0 0.3 0.3 0.0
RMSE 7.7 5.6 22.3 6.4 5.8 22.7 4.8 5.0 22.2 6.3 5.5 22.4
SD 4.2 3.8 12.8 2.3 3.6 14.8 2.1 3.8 13.7 2.9 3.7 13.8
SD95% 2.1 1.8 5.8 2.0 1.8 6.3 1.9 1.8 7.0 2.0 1.8 6.4

List of available PPP software and free online services

Software package Provider
PPP software package gLAB Research group of Astronomy and Geomatics (gAGE) from the Universitat Politecnica de Catalunya (UPC) (Sanz et al. 2012)
Net_Diff GNSS Analysis Center, Shanghai Astronomical Observatory, Chinese Academy of Sciences (https://github.com/YizeZhang/Net_Diff)
PRIDE PPP-AR GNSS Research Center of Wuhan University, China (https://geodesy.noaa.gov/gps-toolbox/PRIDE.htm)
GAMP Research group at the German Research Centre for Geosciences GFZ (Zhou et al. 2018)
Bernese GNSS V. 5.2 Astronomical Institute of the University of Bern (AIUB), Switzerland (Dach & Walser 2015)
GIPSY-OASIS II Jet Propulsion Laboratory (JPL), California Institute of Technology, USA (https://gipsy-oasis.jpl.nasa.gov/index.php?page=software)
RTKLIB Tomoja Takasu at Tokyo University Marine Science and Technology, Japan (http://www.rtklib.com/)
NAPEOS European Space Agency (http://www.esa.int/Enabling_Support/Operations/NAPEOS)
GAMIT/GLOBK Department of Earth, Atmospheric, and Planetary Sciences at the Massachusetts Institute of Technology (MIT) (http://geoweb.mit.edu/gg/)
PPP free online service CSRS-PPP Canadian Geodetic Survey (CGS) (https://webapp.geod.nrcan.gc.ca/geod/tools-outils/ppp.php)
APPS-PPP Jet Propulsion Laboratory (JPL), California Institute of Technology, USA (http://apps.gdgps.net/)
GAPS-PPP GNSS Analysis and Positioning Software, Department of Geodesy and Geomatics Engineering University of New Brunswick (http://gaps.gge.unb.ca/)
magicGNSS GMV Aerospace and Defence S.A., Spain (https://magicgnss.gmv.com/)

Statistics of static-PPP solution for IGS-CORS in millimeters

DOY201 DOY202 DOY203 Mean
E N h E N h E N h E N h
Max. 3.0 3.0 8.0 2.0 2.0 12.0 4.0 2.0 5.0 3.0 2.3 8.3
μ 1.3 1.2 3.3 1.0 1.3 5.5 1.2 1.2 3.0 1.2 1.2 3.9
Min. 0.0 0.0 0.0 0.0 0.0 1.0 0.0 1.0 2.0 0.0 0.3 1.0
RMSE 1.7 1.6 4.5 1.3 1.5 6.7 1.8 1.2 3.2 1.6 1.4 4.8
SD 1.2 1.2 3.3 0.9 0.8 4.2 1.5 1.2 1.3 1.2 1.1 2.9
SD95% 1.0 0.8 1.0 0.9 0.8 1.0 0.5 0.8 1.3 0.8 0.8 1.1

CSRS-PPP processing parameters

Item Processing parameter
GNSS system GPS and GLONASS
Reference system ITRF2014 (epoch 2019)
Coordinate format XYZ/Ellipsoidal/UTM
Satellite orbit and clock ephemeris IGS final (Orbit: 15-minute interval & clock: 30-second interval)
Satellite phase center offsets IGS-ANTEX (NGS 2021)
Receiver phase center offsets IGS-ANTEX (NGS 2021)
Elevation angle 7.5°
Sampling rate 30 s
Ionospheric model Linear ionosphere-free combination + second-order parameters
Tropospheric model

Dry: Davis (GPT) (Sakurai 1985; Kouba 2009)

Wet: Hopfield model (GPT) (Hopfield 1969; Kouba 2009)

VMF1 (Böhm & Schuh 2004)
Software CSRS-PPP
Observation data Single/dual frequency and static/kinematic
Data transfer Email
Ocean tide loading FES 2004 (Le Provost & Lyard 1997)
eISSN:
2083-6104
Język:
Angielski
Częstotliwość wydawania:
4 razy w roku
Dziedziny czasopisma:
Geosciences, other
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