MGEX Data Download

MGEX Data Holdings

The MULTI-GNSS Experiment (MGEX) had been set-up by the IGS to track, collate and analyze all available GNSS signals. This includes signals from Beidou, Galileo, QZSS, and Irnss, as well as from modernized GPS and GLONASS satellites and any space-based Augmentation System (SBAS) of interest. Analysis centers would attempt to estimate inter-system calibration biases, compare equipment performance and further devel OP processing software capable of handling multiple GNSS observation data. Recent observation data of  IGS MULTI-GNSS stations  in  RINEX3  format is available from the IGS Glo Bal data Centers crustal Dynamics data Information System (CDDIS) Institut géographique National (IGN) Bundesamt dealt Karto Graphie und Geodäsie (BKG) The RINEX 3 file names comprise a 9-char station+ country  identification, an 11-digit STA RT epoch, as well as both 3-char/digit fields indicating the nominal duration and sampling. By the example, Mas100esp_r_20142350000_01d_30s_mO.crx.gz denotes a RINEX 3 gzipped daily, Hatanaka compressed observation file with 30-s sampling for the IGS MAS1 station In Spain. A detailed specification of the new file naming scheme is provided as part of the  RINEX3  standard. RINEX 2 files that reside in the same directory follow the old "8.3" naming scheme, e.g., mas12350.14d.z. The archives provide daily RINEX files at $ update rate as well as  high-rate   (1 Hz) files for selected stat Ions. An overview of tracked satellites and supported observation types for all MGEX stations are provided in a dedicated  R Inex observation File Summary  maintained by the astronomical Institute of the University.Historic DataProvision of MGEX observation data started with dedicated MGEX project directories at the global data centers. In the frame of the RINEX transition plan the IGS pursued the integration of MULTI-GNSS observation and navigation data In RINEX3 format and RINEX2 data from legacy stations in 2015/2016. Historic MGEX observation files back to +-individual stations and days even Toric MGEX Data at Cddis historic MGEX data at IGN historic MGEX data at BKGNotes MGEX observation and navigation data is provided on a best-effort basis and could not be offer at the same level of consistency, Quality and availability as legacy Gps/glo data sets from the core IGS network. RINEX3 files in the MGEX repository is generated within the receiver, from offline conversion of raw receiver data by The station provider using VENDOR-SPECIFIC or proprietary offline tools, or from RTCM3-MSM real-time data streams using BK G ' s BNC software. Furthermore, different generation methods may apply for daily and high-rate data files. Depending on the employed tool chain and software revisions, various deficiencies has occured that affect past and/or cur Rent data in the Mgefx archive. Users cannot presently expect full consistency of all data and literal adherence to the RINEX3 standard. Known problems include insonsistency of implemented features and RINEX version number (3.01, 3.02, 3.03) absence of mandat Ory header lines (e.g. phase alignment information or GLONASS slot Numbers) Use of improper observation type designations (e.g., c5x instead of c5q for pilot-only tracking of the l5/e5a si gnal) Differences in observation values between data from RTCM3-MSM streams and unprocessed receiver data. Inconsistent observation types for Beidou B1 observations due to inconsistent definitions in recent RINEX versions (C2i in RINEX 3.01 and 3.03 vs. c1i in RINEX 3.02). In addition, receiver-specific problems could result in a degraded measurement quality for some of the new signals and const ellations. 

While an effort are made to continuously improve the overall quality and consistency of the MGEX data in cooperation with a ll providers, the MGEX project relies on volunteers and can ' t commits on fixing all problems on short notice. However, the feedback of all users are appreciated to document known issues and to share this infomarmation within the MGEX Community. Real-time Data

Real-time data streams for a large fraction of MGEX stations is publicly available at the MGEX Ntrip caster of BKG. Infor Mation on accessing (or contributing) MGEX real-time streams are provided on the MGEX real-time streaming FAQ page of BKG.