PRIDE-PPPAR ver. 3.0 (last updated on 2024-09-08)

PRIDE PPP-AR originates in Dr. Maorong Ge’s efforts on PPP-AR and later developed and improved by Dr. Jianghui Geng's team. It is an open-source software package which is based on many GNSS professionals’ collective work in GNSS Research Center, Wuhan University. We would like to thank them all for their brilliant contributions to this software.

We make this package open source with the goal of benefiting those professionals in their early career, and also advocate the geodetic and geophysical applications of GNSS PPP-AR. Especially, we hope that this package can contribute to high-precision applications in geosciences such as crustal motion and troposphere sounding studies. The entire open-source project is funded by the National Natural Science Foundation of China (No. 42025401) and is under the auspices of IAG Sub-Commission 4.2 "Multi-constellation and multi-frequency GNSS" and IGS Pilot Project PPP-AR.

The GNSS products are accessible at ftp://igs.gnsswhu.cn/pub/whu/phasebias. Latest updates for Support, Training courses and FAQ can be found at http://pride.whu.edu.cn. The copyright of this package is protected by GNU General Public License (version 3).

Relevant publications are

• Geng J, Zhang Q, Li G, Liu J, Liu D (2022). Observable-specific phase biases of Wuhan multi-GNSS experiment analysis center's rapid satellite products. Satellite Navigation, 3(1):1-15. doi:10.1186/s43020-022-00084-0
• Geng J, Wen Q, Zhang Q, Li G, Zhang K (2022). GNSS observable-specific phase biases for all-frequency PPP ambiguity resolution. Journal of Geodesy, 96(11):1-18. doi:10.1007/s00190-022-01602-3
• Geng J, Mao S (2021). Massive GNSS network analysis without baselines: Undifferenced ambiguity resolution. Journal of Geophysical Research: Solid Earth. 126(10), e2020JB021558. doi:10.1029/2020JB021558
• Geng J, Yang S, Guo J (2021). Assessing IGS GPS/Galileo/BDS-2/BDS-3 phase bias products with PRIDE PPP-AR. Satellite Navigation, 2(1):1-15. doi:10.1186/s43020-021-00049-9
• Geng J, Chen X, Pan Y, Zhao Q (2019). A modified phase clock/bias model to improve PPP ambiguity resolution at Wuhan University. Journal of Geodesy, 93(10):2053-2067. doi:10.1007/s00190-019-01301-6
• Geng J, Chen X, Pan Y, Mao S, Li C, Zhou J, Zhang K (2019). PRIDE PPP‑AR: an open‑source software for GPS PPP ambiguity resolution. GPS Solutions, 23(91):1-10. doi:10.1007/s10291-019-0888-1
• Zeng J, Geng J, Li G, Tang W (2024). Improving cycle slip detection in ambiguity-fixed precise point positioning for kinematic LEO orbit determination. GPS Solutions, 28(3): 135. doi:10.1007/s10291-024-01639-1

PRIDE PPP-AR ver. 3.0 is available for:

1) Multi-GNSS data processing with GPS, GLONASS, Galileo, BDS-2/3 and QZSS 2) All-frequency PPP-AR on any dual-frequency ionosphere-free combinations of GPS, Galileo, and BDS-2/3 3) High-rate GNSS data processing up to 50 Hz 4) High-dynamic mobile platforms applicable for aerial photogrammetry, ship-borne gravimetry, etc. 5) Kinematic orbiting for LEO satellites 6) Multi-day processing up to 108 days (at a sampling rate of 30 s) without day-boundary discontinuities 7) IPPP clock estimation for time and frequency transfer 8) Troposphere modeling with Vienna Mapping Function 1/3 (VMF1/VMF3) 9) Second-order ionospheric delay correction with GIM products 10) Receiver clock jump detection and mitigation 11) Adoption of the latest IGS conventions: Bias-SINEX, IGS20 reference frame, ORBEX, RINEX 4, etc. 12) User-friendly operation and visualization for early-career researchers with lite-version GUI 13) Ambiguity-float PPP with backward compatibility from 1994 when selective availablity (SA) was on 14) Timely data processing with rapid (RAP) products and real-time archived (RTS) products

The improvements made in PRIDE PPP-AR version 3.0 include:

• Enable all-frequency PPP-AR on any dual-frequency ionosphere-free combinations
• Employ the latest WUM0MGXRAP products to resolve ambiguities on new GNSS signals (L5/E6/E5b/E5B/B1C/B2a/B2)
• Support kinematic orbiting for LEO satellites
• Improve capability and long-term consistency of multi-day processing
• Provide more command-line options and models for parameter estimation
• Increase compatibility with the latest IGS data and product extensions
• Refine the data format of result files and the output information of program runs

Notes: The all-frequency satellite orbit/clock/bias/ERP/quaternion products from Wuhan University are required by PRIDE PPP-AR

Version History

See our Change Log for detailed update history before version 3.0.

2024-09-08 (v3.0)

• lib & tedit: use DOCB block in BIAS-SINEX file to decide whether reset ambiguity at midnight
• otl: enable self-computed ocean tide loading correction in case of no oceanload coefficients for user stations
• lsq: add a function to support random walk constraint between epochs in position domain (P mode)

2024-04-08 (v3.0)

• lib & spp: enable multi-day processing of non-consecutive daily RINEX files
• tedit: improve implementation of loose editing for kinematic positioning
• lsq: reduce the weight of GLONASS pseudorange observations to improve multi-GNSS positioning performance

2024-02-08 (v3.0)

• Employ the latest WUM0MGXRTS products to perform all-frequency PPP-AR on GNSS data with hours latency
  • Real-time archived from Wuhan University GPS/Galileo/BDS phase bias stream and updated every 3 hours
• lib & spp: fix bug for unexpected termination in multi-day processing

2023-12-13 (v3.0)

• pdp3: add IGN FTP site ftp://igs.ign.fr/pub/igs/products/mgex/ to GNSS product download path
• pdp3: refine the procedures for ambiguity resolution when missing code/phase biases for some satellites

2023-11-24 (v3.0)

Release of PRIDE PPP-AR v3.0

• Enable all-frequency PPP-AR on any dual-frequency ionosphere-free combinations
  • pdp3: add -frq option to choose the signal frequencies for each GNSS
  • pdp3: add verification for the availability of observations and code/phase OSBs
• Employ the latest WUM0MGXRAP products to resolve ambiguities on new GNSS signals
  • Rapid all-frequency phase clock/bias products from Wuhan Univeristy
  • Support ambiguity resolution on GPS L1/L2/L5, Galileo E1/E5a/E6/E5b/E5, BDS B1C/B1I/B2a/B3I/B2
  • Append satellite orbit, clock, and quaternion records at the second midnight
  • Align phase clock/bias across consecutive days to mitigate day-bounday discontinuities
• Support precise orbit determination for LEO satellites
  • pdp3: add L positioning mode for kinematic orbiting of LEO satellites
  • table: add processing scripts for GRACE and GRACE-FO, other LEO satellites can be integrated manually
  • table: add setting LEO quaternions in config_template to specify attitude products for LEO satellites
• Improve capability and long-term consistency of multi-day processing
  • Enhance capability of multi-day processing to 108 days
  • Enable establishing integer-ambiguity constraints across midnights with aligned GNSS products to mitigate day-boundary discontinuities in the result
  • table: add setting Truncate at midnight in config_template to set whether to truncate ambiguities at the day boundaries
• Provide more command-line options and models for parameter estimation
  • pdp3: add -r option to choose WNO/STO model for receiver clock estimation
  • pdp3: add -h option to choose NON/PWC/STO model for HTG estimation
• Increase compatibility with the latest IGS data and product extensions
  • Support observation data and broadcast ephemerides in RINEX 4
  • lib: fix bug for not reading interspersing AR and AS clock records
  • lib: fix bug for not reading time-varying OSB estimates and their gradients
  • lib: fix bug for not reading non-16-digit quaternions
• Refine the data format of result files and the output information of program runs
  • Add header information (antenna, PCO, frequency selection, positioning mode, etc.) in result files
  • Increase the number of digits in kin file and res file
  • pdp3: add -v option to output detailed information from arsig and lsq
  • xyz2enu: output RMS instead of STD when reference coordinates are specified

Special notes for compatibility with older versions of PRIDE PPP-AR:

1) pdp3_Mac.sh has been integrated into pdp3.sh 2) Older versions of PRIDE PPP-AR cannot recognize the new namings of WUM0MGXRAP and WUM0MGXRTS products 3) Older versions of PRIDE PPP-AR cannot read the new settings in configuration file 4) Older versions of PRIDE PPP-AR cannot read the new format in result files

Getting in Touch

• You can contact us for bug reports and comments by sending an email or leaving a message on our website:
  • Email: pride@whu.edu.cn
  • Website: http://pride.whu.edu.cn
• For Chinese users, we provide Tencent QQ Group service.
  • QQ group: 971523302

License

Copyright (C) 2023 by Wuhan University, All rights reserved.