Enabling Deep Space CubeSat Missions: Telecommunication challenge

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Presentation transcript:

Enabling Deep Space CubeSat Missions: Telecommunication challenge Nacer Chahat and Richard Hodges nacer.e.chahat@jpl.nasa.gov NASA Jet Propulsion Laboratory California Institute of Technology PRE-DECISIONAL INFORMATION – For Planning and Discussion Purposes Only.

Mars Reconnaissance orbiter MRO Distance (km) 100-400 million Data-rate 500 Kbps to 4 Mbps Power 100W (X-band) 35W (Ka-band) Antenna size 3m Antenna gain 46.7dBi (X-band) 56.4dBi (Ka-band) Pointing accuracy 0.1° At a maximum distance from Earth (400 million km [250 million miles]), the orbiter is designed to send data at a rate of at least 500 kbp s. At closer ranges, the signal strength will be greater, so higher data rates will be possible. Wh en the orbiter is at its closest ranges (about 100 milliom km [60 million miles]), for several months the orbiter will be able to send data to Earth at 3 to 4 megabits per second (Mbps). Mars Reconnaissance orbiter PRE-DECISIONAL INFORMATION – For Planning and Discussion Purposes Only.

MARS cubesat requirement MRO CubeSat Distance (km) 100-400 million 149 million Data-rate 500 Kbps to 4 Mbps 8kbps Power 100W (X-band) 35W (Ka-band) 4W (X-band) 2W (ka-band) Antenna size 3m ~0.5m Antenna gain 46.7dBi (X-band) 56.4dBi (Ka-band) 30dBi (X-band) 42dBi (Ka-band) Pointing accuracy ±0.1° ±2° MARS cubesat requirement PRE-DECISIONAL INFORMATION – For Planning and Discussion Purposes Only.

TX/RX Patch antenna array TX / RX patch array at X-band Stowage volume: 1x10x30cm3 (3U) 1x20x30cm3 (6U) Antenna gain: 23 dBi (3U)  4kbps 26 dBi (6U)  7.5kbps 20cm 30cm TX/RX Patch antenna array PRE-DECISIONAL INFORMATION – For Planning and Discussion Purposes Only.

TX Patch antenna array Two antenna : TX and RX antenna at X-band TX antenna stowage volume : 1x10x20cm3 (3U) 1x20x20cm3 (6U) Antenna directivity: 19.6 dBi (3U)  1.9 kbps 22.6 dBi (6U)  3.8 kbps RX 20cm 20cm At a maximum distance from Earth (400 million km [250 million miles]), the orbiter is designed to send data at a rate of at least 500 kbp s. At closer ranges, the signal strength will be greater, so higher data rates will be possible. When the orbiter is at its closest ranges (about 100 milliom km [60 million miles]), for several months the orbiter will be able to send data to Earth at 3 to 4 megabits per second (Mbps). TX Patch antenna array PRE-DECISIONAL INFORMATION – For Planning and Discussion Purposes Only.

RX Patch antenna array Two antenna : TX and RX antenna at X-band RX antenna stowage volume : 1x10x20cm3 (3U) 1x10x20cm3 (6U) RX antenna directivity: 15.7 dBi (3U) 18.7 dBi (6U) RX 20cm 10cm At a maximum distance from Earth (400 million km [250 million miles]), the orbiter is designed to send data at a rate of at least 500 kbp s. At closer ranges, the signal strength will be greater, so higher data rates will be possible. When the orbiter is at its closest ranges (about 100 milliom km [60 million miles]), for several months the orbiter will be able to send data to Earth at 3 to 4 megabits per second (Mbps). RX Patch antenna array PRE-DECISIONAL INFORMATION – For Planning and Discussion Purposes Only.

Reflectarray antenna X-band antennas Antenna gain: 29.5 dBi (TX) Stowage volume: 2x20x30cm3 (6U) Data-rate: 8Kbps Deployable Feed Reflectarray Panels RX Antenna At a maximum distance from Earth (400 million km [250 million miles]), the orbiter is designed to send data at a rate of at least 500 kbp s. At closer ranges, the signal strength will be greater, so higher data rates will be possible. When the orbiter is at its closest ranges (about 100 milliom km [60 million miles]), for several months the orbiter will be able to send data to Earth at 3 to 4 megabits per second (Mbps). ISARA Ka-Band Reflectarray Panels Reflectarray antenna PRE-DECISIONAL INFORMATION – For Planning and Discussion Purposes Only.

Deployable High Gain antenna Ka-band antenna Antenna gain: 42.5 dBi Stowage volume: 1.5U Data-rate: 8Kbps At a maximum distance from Earth (400 million km [250 million miles]), the orbiter is designed to send data at a rate of at least 500 kbp s. At closer ranges, the signal strength will be greater, so higher data rates will be possible. When the orbiter is at its closest ranges (about 100 milliom km [60 million miles]), for several months the orbiter will be able to send data to Earth at 3 to 4 megabits per second (Mbps). Deployable High Gain antenna PRE-DECISIONAL INFORMATION – For Planning and Discussion Purposes Only.

Questions? At a maximum distance from Earth (400 million km [250 million miles]), the orbiter is designed to send data at a rate of at least 500 kbp s. At closer ranges, the signal strength will be greater, so higher data rates will be possible. When the orbiter is at its closest ranges (about 100 milliom km [60 million miles]), for several months the orbiter will be able to send data to Earth at 3 to 4 megabits per second (Mbps). Questions? 2014 California Institute of Technology. Government sponsorship acknowledged. PRE-DECISIONAL INFORMATION – For Planning and Discussion Purposes Only.