Communications Ground Stations Communication Equipment Alternative Landing Method

Communication Equipment on Lander 100 gram Payload Equipment Model Manufacturer Mass (kg) Power Usage

10 kg Payload Equipment Model Manufacturer Mass (kg) Power Usage (W) Price (2009 $)

Ground Stations Ground Station Latitude (o) Longitude ( o) 1 Mt. Pleasant Radio Observatory.

Backup Slides Top down view of Earth showing ground stations an coverage gaps 1.

Side view of Earth showing coverage of Mt. Pleasant Observatory’s worst case scenario. For

High Energy Tangent Landing § Represents the Lander landing with a significant horizontal velocity

Slides: 7

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Communications Ground Stations Communication Equipment Alternative Landing Method March 26, 2009 AAE 450 Spring 2009 [Trent Muller] [COM]

Communication Equipment on Lander 100 gram Payload Equipment Model Manufacturer Mass (kg) Power Usage (W) Price (2009 $) Lander-Earth Antenna (2) Lander-Earth Receiver Lander-Earth Transmitter Lander-Rover Antenna Lander-Rover Transceiver Computer Board Patch Antenna SSTL 0. 16 -- 40, 000 RX-200 S Space. Quest 0. 2 1. 5 30, 000 TX-2400 Space. Quest 0. 2 34 24, 000 ANT-100 Space. Quest 0. 1 -- 500 TR-400 Space. Quest 0. 21 6 20, 000 RAD 6000 BAE 0. 85 13 200, 000 Video Camera HF 10 Canon 0. 38 3. 9 1, 000 Antenna Pivot (2) -- -- 0. 38 2. 13 168 2. 48 60. 53 315, 668 Totals AAE 450 Spring 2009 [Trent Muller] [COM]

10 kg Payload Equipment Model Manufacturer Mass (kg) Power Usage (W) Price (2009 $) Lander-Earth Antenna (2) Lander-Earth Receiver Lander-Earth Transmitter Computer Board Patch Antenna SSTL 0. 16 -- 40, 000 RX-200 S Space. Quest 0. 2 1. 5 30, 000 TX-2400 Space. Quest 0. 2 34 24, 000 RAD 6000 BAE 0. 85 13 200, 000 Video Camera HF 10 Canon 0. 38 3. 9 1, 000 Antenna Pivot (2) -- -- 0. 38 2. 13 168 Totals 2. 17 54. 53 295, 167 AAE 450 Spring 2009 [Trent Muller] [COM]

Ground Stations Ground Station Latitude (o) Longitude ( o) 1 Mt. Pleasant Radio Observatory. Hobart, Tasmania, Australia 42. 81 S 147. 44 E Dish Size (m) 26 2 Ventspils International Radio Astronomy Centre (VIRAC). Irbene, Latvia 57. 55 N 21. 85 E 32 3 Pisgah Astronomical Research Institute (PARI). Rosman, North Carolina 35. 20 N 82. 87 W 26 • Worst case altitude for coverage gap : 80, 000 km from VIRAC • Plan to use Universal Space Network from LEO to 80, 000 km • Universal Space network consists of 14 ground stations all around the world • Estimated cost: $1 million (2009$) for one year of usage, one station at a time. AAE 450 Spring 2009 [Trent Muller] [COM]

Backup Slides Top down view of Earth showing ground stations an coverage gaps 1. Mt. Pleasant 2. VIRAC 3. PARI Altitdues Altitude (km) h 1 7662. 33 h 2 3977. 22 h 3 8704. 07 AAE 450 Spring 2009 [Trent Muller] [COM]

Side view of Earth showing coverage of Mt. Pleasant Observatory’s worst case scenario. For southern hemisphere: Moon’s orbital inclination positive with northern hemisphere tilted towards the Moon Observatory Altitude (km) Hobart 18031. 14 km Irbene 79232. 09 km Rosman 11569. 17 km AAE 450 Spring 2009 [Trent Muller] [COM]

High Energy Tangent Landing § Represents the Lander landing with a significant horizontal velocity and sliding on Lunar surface without skipping, digging in, or creating a crater immediately upon impact. § Assumes constant deceleration based on initial impact. § Based on an old design iteration with a dry mass of 163. 49 kg § Shows three landing cases 1) 10 g 2) 15 g 3) 20 g AAE 450 Spring 2009 [Trenten Muller] [COM]