2 Systems for remote sensing, including passive and active sensing systems, operating on both ground-based and space-based platforms.

3 Radio astronomy and radar astronomy.

4 Dissemination, reception and coordination of standard-frequency and time-signal services, including the application of satellite techniques, on a worldwide basis.

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ITU-R Meetings schedule - Meeting sessions - Member Information and Delegate Registration

• Working Party 7A (WP 7A) - Time signals and frequency standard emissions
• Working Party 7B (WP 7B) - Space radiocommunication applications
• Working Party 7C (WP 7C) - Remote sensing systems
• Working Party 7D (WP 7D) - Radio astronomy
• Joint Task Group 4-5-6-7 (JTG 4-5-6-7) - WRC-15 Agenda items 1.1 and 1.2

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• Rec. ITU-R TF.583 (Time codes) English only
• Characteristics of standard-frequency and time-signal emissions (see also Rec. ITU-R TF.768 - Standard frequencies and time signals) English only