Access the full text.
Sign up today, get DeepDyve free for 14 days.
E. Shume, P. Vergados, A. Komjathy, R. Langley, T. Durgonics (2017)
Electron number density profiles derived from radio occultation on the CASSIOPE spacecraftRadio Science, 52
M. Kelley, V. Wong, N. Aponte, C. Coker, A. Mannucci, A. Komjathy (2009)
Comparison of COSMIC occultation‐based electron density profiles and TIP observations with Arecibo incoherent scatter radar dataRadio Science, 44
W. Schreiner, S. Sokolovskiy, C. Rocken, D. Hunt (1999)
Analysis and validation of GPS/MET radio occultation data in the ionosphereRadio Science, 34
P. Stephens, A. Komjathy, B. Wilson, A. Mannucci (2011)
New leveling and bias estimation algorithms for processing COSMIC/FORMOSAT‐3 data for slant total electron content measurementsRadio Science, 46
J. Lei, S. Syndergaard, A. Burns, S. Solomon, Wenbin Wang, Z. Zeng, R. Roble, Qian Wu, Y. Kuo, J. Holt, Shunrong Zhang, D. Hysell, F. Rodrigues, Chien-Hung Lin (2007)
Comparison of COSMIC ionospheric measurements with ground-based observations and model predictions : Preliminary resultsJournal of Geophysical Research, 112
N. Pedatella, X. Yue, W. Schreiner (2015)
An improved inversion for FORMOSAT‐3/COSMIC ionosphere electron density profilesJournal of Geophysical Research: Space Physics, 120
L. Estey, C. Meertens (1999)
TEQC: The Multi-Purpose Toolkit for GPS/GLONASS DataGPS Solutions, 3
(1987)
GPS Navigation for Low-Earth Orbiting Vehicles, NASA 87-FM-2, Rev. 1, JSC-32031
A. Coster, J. Williams, A. Weatherwax, W. Rideout, D. Herne (2013)
Accuracy of GPS total electron content: GPS receiver bias temperature dependenceRadio Science, 48
C. Watson, P. Jayachandran, J. MacDougall (2016)
Characteristics of GPS TEC variations in the polar cap ionosphereJournal of Geophysical Research: Space Physics, 121
The effect of shell height on high precision ionospheric modeling using GPS
D. Themens, P. Jayachandran, M. Nicolls, J. MacDougall (2014)
A top to bottom evaluation of IRI 2007 within the polar capJournal of Geophysical Research: Space Physics, 119
B. Reinisch, I. Galkin (2011)
Global Ionospheric Radio Observatory (GIRO)Earth, Planets and Space, 63
I. Kutiev, P. Marinov (2007)
Topside sounder model of scale height and transition height characteristics of the ionosphereAdvances in Space Research, 39
(2015)
Intermediate scale plasma
Hofmann-Wellenhof (2001)
10.1007/978-3-7091-6199-9_6
P. Jayachandran, Richard Langley, John MacDougall, S. Mushini, D. Pokhotelov, A. Hamza, Ian Mann, D. Milling, Z. Kale, R. Chadwick, T. Kelly, D. Danskin, C. Carrano (2009)
Canadian High Arctic Ionospheric Network (CHAIN)Radio Science, 44
G. Blewitt (1990)
An Automatic Editing Algorithm for GPS dataGeophysical Research Letters, 17
B. Hofmann‐Wellenhof, H. Lichtenegger, J. Collins (2001)
GPS: Theory and Practice
J. Sanz, J. Juan, A. Rovira‐Garcia, G. González‐Casado (2017)
GPS differential code biases determination: methodology and analysisGPS Solutions, 21
X. Yue, W. Schreiner, Y. Kuo, Qian Wu, Y. Deng, Wenbin Wang (2013)
GNSS radio occultation (RO) derived electron density quality in high latitude and polar region: NCAR-TIEGCM simulation and real data evaluationJournal of Atmospheric and Solar-Terrestrial Physics, 98
(2007)
Comparison of COSMIC ionospheric measurements
M. Nicolls, F. Rodrigues, G. Bust, J. Chau (2009)
Estimating E region density profiles from radio occultation measurements assisted by IDA4DJournal of Geophysical Research, 114
(2001)
Observables. In GPS: Theory and Practice (pp. 87–132)
A. Komjathy, R. B. Langley (1996)
Proceedings of the 1996 IGS Workshop
D. Themens, P. Jayachandran, R. Langley, J. MacDougall, M. Nicolls (2011)
Determining receiver biases in GPS-derived total electron content in the auroral oval and polar cap region using ionosonde measurementsGPS Solutions, 17
D. Themens, P. Jayachandran, R. Langley (2015)
The nature of GPS differential receiver bias variability: An examination in the polar cap regionJournal of Geophysical Research: Space Physics, 120
E. Shume, A. Komjathy, A. Komjathy, Richard Langley, O. Verkhoglyadova, M. Butala, A. Mannucci (2015)
Intermediate‐scale plasma irregularities in the polar ionosphere inferred from GPS radio occultationGeophysical Research Letters, 42
M. Håkansson, A. Jensen, M. Horemuz, G. Hedling (2017)
Review of code and phase biases in multi-GNSS positioningGPS Solutions, 21
A. Yau, H. James (2015)
CASSIOPE Enhanced Polar Outflow Probe (e-POP) Mission OverviewSpace Science Reviews, 189
A. Komjathy, L. Sparks, B. Wilson, A. Mannucci (2005)
Automated daily processing of more than 1000 ground‐based GPS receivers for studying intense ionospheric stormsRadio Science, 40
P. Stephens, A. Komjathy, B. Wilson, A. Mannucci (2011)
New leveling and bias estimation algorithms for processing COSMIC/FORMOSAT‐3 data for slant total electron content, 46
J. MacDougall, P. Jayachandran (2007)
Polar patches: Auroral zone precipitation effectsJournal of Geophysical Research, 112
O. Maltseva, N. Mozhaeva, O. Poltavsky, G. Zhbankov (2012)
Use of TEC global maps and the IRI model to study ionospheric response to geomagnetic disturbancesAdvances in Space Research, 49
(2011)
Global Ionospheric Radio Observatory (GIRO). Earth, Planets and Space
W. Lear (1987)
GPS Navigation for Low‐Earth Orbiting Vehicles
S. Sadighi, P. Jayachandran, N. Jakowski, J. MacDougall (2009)
Comparison of the CHAMP radio occultation data with the Canadian advanced digital ionosonde in the Polar RegionsAdvances in Space Research, 44
J. Zhong, J. Lei, X. Dou, X. Yue (2016)
Assessment of vertical TEC mapping functions for space-based GNSS observationsGPS Solutions, 20
U. Foelsche, G. Kirchengast (2002)
A simple “geometric” mapping function for the hydrostatic delay at radio frequencies and assessment of its performanceGeophysical Research Letters, 29
A. Yau, A. Howarth, A. White, G. Enno, P. Amerl (2015)
Imaging and Rapid-Scanning Ion Mass Spectrometer (IRM) for the CASSIOPE e-POP MissionSpace Science Reviews, 189
J. Zhong, J. Lei, X. Yue, X. Dou (2016)
Determination of Differential Code Bias of GNSS Receiver Onboard Low Earth Orbit SatelliteIEEE Transactions on Geoscience and Remote Sensing, 54
M. Gorbunov, L. Kornblueh (2001)
Analysis and validation of GPS/MET radio occultation dataJournal of Geophysical Research, 106
G. Ma, T. Maruyama (2002)
Derivation of TEC and estimation of instrumental biases from GEONET in JapanAnnales Geophysicae, 21
Don Kim, R. Langley (2019)
The GPS Attitude, Positioning, and Profiling Experiment for the Enhanced Polar Outflow Probe Platform on the Canadian Cassiope SatelliteGeoinformatica
This paper presents validation of ionospheric Global Positioning System (GPS) radio occultation measurements of the GPS Attitude, Positioning, and Profiling Experiment occultation receiver (GAP‐O). GAP is one of eight instruments comprising the Enhanced Polar Outflow Probe (e‐POP) instrument suite on board the Cascade Smallsat and Ionospheric Polar Explorer (CASSIOPE) satellite. One of the main error sources for certain GAP‐O data products is the receiver differential code bias (rDCB). A minimization of standard deviations (MSD) technique has shown the most promise for rDCB estimation, with estimates ranging primarily from −40 to −28 total electron content units (TECU = 1016 el m−2; 21.6 to 15.1 ns), including a long‐term decrease in rDCB magnitude and variability over the first 3 years of instrument operation. In application of the MSD method, the sensitivity of bias estimates to ionospheric shell height are as large as 4.5 TECU per 100 km. MSD calculations also agree well with the “assumption of zero topside TEC” method for rDCB estimate at satellite apogee. Bias‐corrected topside TEC of GAP‐O was validated by statistical comparison with topside TEC obtained from ground‐based GPS TEC and ionosonde measurements. Although GAP‐O and ground‐based topside TEC had similar variability, GAP‐O consistently underestimated the ground‐derived topside TEC by up to 7 TECU. Ionospheric electron density profiles obtained from Abel inversion of GAP‐O occultation TEC showed good agreement with F region densities of ground‐based incoherent scatter radar measurements. Comparison of GAP‐O and ionosonde measurements revealed correlation coefficients of 0.78 and 0.79, for peak F region density and altitude, respectively.
Radio Science – Wiley
Published: Jan 1, 2018
Keywords: ; ; ; ; ;
Read and print from thousands of top scholarly journals.
Already have an account? Log in
Bookmark this article. You can see your Bookmarks on your DeepDyve Library.
To save an article, log in first, or sign up for a DeepDyve account if you don’t already have one.
Copy and paste the desired citation format or use the link below to download a file formatted for EndNote
Access the full text.
Sign up today, get DeepDyve free for 14 days.
All DeepDyve websites use cookies to improve your online experience. They were placed on your computer when you launched this website. You can change your cookie settings through your browser.