Science services

Study period : 2019-2023

“Science services” refer to the standard frequency and time signal, space research (SRS), space operation, Earth exploration-satellite (EESS), meteorological-satellite (MetSat), meteorological aids (MetAids) and radio astronomy (RAS) services.

The systems linked with Study Group 7 are used in activities that are a critical part of our everyday life such as:

  • global environment monitoring atmosphere (including greenhouse gases emissions), oceans, land surface, biomass, etc.;

  • weather forecasting and climate change monitoring and prediction;

  • detection and tracking of many natural and man-made disasters (earthquakes, tsunamis, hurricanes, forest fires, oil leaks, etc);

  • providing alerting/warning information;

  • damage assessment and planning relief operations.


SG 7 also encompasses systems for the study of outer space:

  • satellites for studying the sun, the magnetosphere and all the elements ofour solar system;
  • spacecraft for human and robotic exploration of extraterrestrial bodies;
  • Earth and satellite-based radioastronomy to study the universe and itsphenomena.


Study Group 7 develops ITU-R Recommendations, Reports and handbooks that are used for development and ensuring non-interference operation of space operation, space research, Earth-exploration and meteorological systems (including the related use of links in the inter-satellite service), radio astronomy and radar astronomy, dissemination, reception and coordination of standard-frequency and time-signal services (including the application of satellite techniques) on a worldwide basis.


Four Working Parties (WPs) carry out studies on Questions assigned to Study Group (SG) 7

  • WP 7A: Time signals and frequency standard emissions: Systems and applications (terrestrial and satellite) for dissemination of standard time and frequency signals;
  • WP 7B: Space radiocommunication applications: Systems for transmission/reception of telecommand, tracking and telemetry data for space operations, space research, Earth exploration-satellite, andmeteorological satellite services including the related use of links in the inter-satellite service;
  • WP 7C: Remote sensing systems: active and passive remote sensing applications in the Earth exploration-satellite service and systems of the MetAids service, as well as ground based passive sensors, spaceweather sensors and space research sensors, including planetary sensors;
  • WP 7D Radio astronomy: radio astronomy and radar astronomy sensors, both Earth-based and space-based, including space very long baseline interferometry (VLBI).

Corresponding ITU-R Study Group: NSG 7
Management Group
Chairman Sh. PV Kumaramohan, Associate Director, ISRO
Rapporteur Sh. Amit Gulati, Sr. DWA, WPC
NSG 7 Meetings
Contributions No. Contributions date ITU-T Meeting Title Question Name of contributors
Members Area