A system comprising: a LEO satellite, configured to travel around the Earth; a sensor module (102, 104, 106, 108), mounted on the LEO satellite, configured to monitor one or more conditions, circumstances, environments and situations occurring on or around, or associated with, the Earth, and to generate sensor data resulting from the monitoring; a relay satellite terminal, mounted on the LEO satellite, configured to execute data communications with a first of a plurality of satellites (111a to 111n) while the relay terminal is in a first area within a communications range of the first satellite; characterised in that upon moving to a second area within a communications range of a second of the plurality of satellites (111a to 111n), the relay satellite terminal is configured to switch the data communications to the second satellite; the LEO satellite configured to maintain a preconfigured table which identifies the available geosynchronous satellites, a control module of the LEO satellite adapted to select one of the satellites (111a to 111n) with which the relay satellite terminal is configured to execute the data communications based on the preconfigured table regarding a location of each of the plurality of satellites (111a to 111n) and configuration data regarding communications protocols associated with each of the plurality of satellites (111a to 111n), whereby the preconfigured table is reconfigured based on ground commanding, whereby the sensor data is transmitted in real-time to the respective one of the first and second satellites for relay by the respective one of the first and the second satellites to a respective GEO hub/gateway (120a, 120b) which relays to a central processing facility for one or more of aggregation processing, analysis and dissemination of the data, the first satellite and/or the second satellite of the plurality of satellites (111a to 111n) is the geosynchronous satellite which each communicates with the respective GEO satellite hub/gateway (120a, 120b); and wherein each of the communications range of the first satellite and the communications range of the second satellite provide general broadband communications functions of the respective satellite via respective communications footprints or locations of the Earth. a LEO satellite, configured to travel around the Earth; a sensor module (102, 104, 106, 108), mounted on the LEO satellite, configured to monitor one or more conditions, circumstances, environments and situations occurring on or around, or associated with, the Earth, and to generate sensor data resulting from the monitoring; a relay satellite terminal, mounted on the LEO satellite, configured to execute data communications with a first of a plurality of satellites (111a to 111n) while the relay terminal is in a first area within a communications range of the first satellite; characterised in that upon moving to a second area within a communications range of a second of the plurality of satellites (111a to 111n), the relay satellite terminal is configured to switch the data communications to the second satellite; the LEO satellite configured to maintain a preconfigured table which identifies the available geosynchronous satellites, a control module of the LEO satellite adapted to select one of the satellites (111a to 111n) with which the relay satellite terminal is configured to execute the data communications based on the preconfigured table regarding a location of each of the plurality of satellites (111a to 111n) and configuration data regarding communications protocols associated with each of the plurality of satellites (111a to 111n), whereby the preconfigured table is reconfigured based on ground commanding, whereby the sensor data is transmitted in real-time to the respective one of the first and second satellites for relay by the respective one of the first and the second satellites to a respective GEO hub/gateway (120a, 120b) which relays to a central processing facility for one or more of aggregation processing, analysis and dissemination of the data, the first satellite and/or the second satellite of the plurality of satellites (111a to 111n) is the geosynchronous satellite which each communicates with the respective GEO satellite hub/gateway (120a, 120b); and wherein each of the communications range of the first satellite and the communications range of the second satellite provide general broadband communications functions of the respective satellite via respective communications footprints or locations of the Earth.