GNSS Post Processing

McCall Consulting offers a Post Processing Bureau for organisations requiring both large and small GNSS data sets Post Processed to provide centimetre level accuracy (or better) for multi-constellation GNSS data.

We can process you data using your base station/s, or use CORS stations surrrounding the area. In some cases, it may be more advantageouse to perform Precesie Point Positioning (at the decimeter level)  if the data set is long and continuous.

For small data sets (up to ten (10) stations, data can be dropped in our File Upload area with the specifics of the data set attached. Processing will typically be completed in less than 24 hours once payment is received.

For larger data sets, discount pricing may be applicable, so its best to contact us with the specifics

We use Grafnet/Grafnav Static Multi constellation Dual Frequency processing software.

Some of the features are

• Full dual frequency GPS, GLONASS, BeiDou, Galileo and QZSS support

• Improved accuracy through forward/reverse processing

• Accurate fixed static solutions and iono-free processing for long baselines

• Compatibility with multiple receiver manufacturers for maximum flexibility

• Trivial Baselines can be eliminated in the network solution

• We can use CORS stations to enhance the accuracey of the network

• Precsie Point Positioning (PPP) avaliable for long continuous occupations

The Benefits from this approach are

• Static processing of the network simultaneously

• Provides best possible position accuracy and precision (centimetre level or better)

• Full Least Squares Network Adjustment

• Manual and automatic loop closure computations

Static Data Procedure

For data that is networked, a full Network adjustment will be performed. Be sure your station names are the same for each occupation of the same mark (the raw data file names must be different for different sessions)

Make sure your antenna heights are to the Antenna Reference Point (normally the lower nut of the antenna). If your measures are to any other point, make sure you give a good description of where they were taken too.

Be sure to leave a description of the Receiver /Antenna combinations used, as antenna profiles will be entered into the processing to ensure the highest quality results.

Simply drop you files in to the File Upload area, then specify the datum you would like the data processed in, the stsaions that are fixed (if any) and the  format for the output (default is comma delimited text file).

Once payment is cleared, we will process the data, and email the results back to you.

Note: Is you require results using the Final Precise Ephemeris (must be specified in data sheet ), results will be available no earlier than 12 days after the observation date). That’s the delay in receiving the Final Precise Ephemeris. Utra

Kinematic (Stop/Go) Data Processing

Our processing techniques can use your base station(s), CORS stations operating in the area, or we apply Precise Point Positioning (PPP) techqiues to the data sets.

The charge for Kinematic Data processing is dependent on the number of base stations (if any) used, the length of the data file (in epochs recorded) and if multiple antenna heights have been used.

GNSS/INS Data Processing

The charge for GNSS/INS Data processing is dependent on the numerous aspects, the length of the data file (in epochs recorded), the number of base stations used,  the type of INS and if its tightly or loosely coupled to the GNSS.