GRUAN Task Team on GNSS Precipitable Water
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Terms of Reference
Task Team on GNSS Precipitable Water (GNSS-PW)
Under the auspices of the WG-GRUAN the GNSS-PW task team was established to:
• To define and update GRUAN requirements for GNSS observations of Zenith Total Delay (ZTD) and PW and other relevant parameters including measurement range, precision, long-term stability, temporal resolution and data latency.
• To define and update GRUAN requirements for a state-of-the-art GNSS station. These include receiver and antenna hardware, antenna monumentation, siting criteria and managing changes. The GRUAN technical document #6 (GRUAN-TD-6) titled “GRUAN Ground-based GNSS Site Guidelines” will be reviewed and updated as needed.
•To work with the GRUAN GNSS-PW central processing center (GFZ) to develop and implement guidance on the type, number, format, temporal resolution and latency of data and associated metadata needed to be stored from the ground-based GNSS measurements and other auxiliary data sources, and data archive and dissemination methods.
•To develop methods to calculate GNSS ZTD and PW uncertainties for each data point and to work with GFZ to incorporate them into the GRUAN GNSS data stream.
•To assist GRUAN sites to interpret and implement GRUAN guidelines on GNSS observations and provide expert advice to the sites on questions related to GNSS observations.
•To encourage and recommend experiments and research pertinent to GNSS observations, data processing, and scientific applications in collaboration with other relevant programmes and projects, such as the European COST project “GNSS4SWEC - Advanced Global Navigation Satellite Systems tropospheric products for monitoring severe weather events and climate”.
•To provide expert advice to the GRUAN community on other geodetic techniques and applications, such as GNSS radio-occultation (GNSS-RO).
Under the auspices of the WG-GRUAN the GNSS-PW task team was established to:
• To define and update GRUAN requirements for GNSS observations of Zenith Total Delay (ZTD) and PW and other relevant parameters including measurement range, precision, long-term stability, temporal resolution and data latency.
• To define and update GRUAN requirements for a state-of-the-art GNSS station. These include receiver and antenna hardware, antenna monumentation, siting criteria and managing changes. The GRUAN technical document #6 (GRUAN-TD-6) titled “GRUAN Ground-based GNSS Site Guidelines” will be reviewed and updated as needed.
•To work with the GRUAN GNSS-PW central processing center (GFZ) to develop and implement guidance on the type, number, format, temporal resolution and latency of data and associated metadata needed to be stored from the ground-based GNSS measurements and other auxiliary data sources, and data archive and dissemination methods.
•To develop methods to calculate GNSS ZTD and PW uncertainties for each data point and to work with GFZ to incorporate them into the GRUAN GNSS data stream.
•To assist GRUAN sites to interpret and implement GRUAN guidelines on GNSS observations and provide expert advice to the sites on questions related to GNSS observations.
•To encourage and recommend experiments and research pertinent to GNSS observations, data processing, and scientific applications in collaboration with other relevant programmes and projects, such as the European COST project “GNSS4SWEC - Advanced Global Navigation Satellite Systems tropospheric products for monitoring severe weather events and climate”.
•To provide expert advice to the GRUAN community on other geodetic techniques and applications, such as GNSS radio-occultation (GNSS-RO).
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