Payload and Mobility Measure 15 samples in the dark and 5 samples in light. The Viking Lander did not move, but it used an SSRA with a boom, collector.

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Payload and Mobility Measure 15 samples in the dark and 5 samples in light. The Viking Lander did not move, but it used an SSRA with a boom, collector head, and shroud unit, capable of collecting a variety of material elements. Each sampling site separated by 500 m. The Viking Lander did not have this capability. Determine composition, geotechnical properties, and volatile content of regolith. The Viking Lander used an X-ray Fluorescent Spectrometer (XRFS) to perform a chemical analysis. Enhanced geological characterization (multispectral imager & remote sensing instrument). The XRFS plus a remote sensing instrument may be used for this function.

Observation Viking Lander camera system LETS camera system Looked at surface and was able to measure optical density of the atmosphere Geologically characterize the surface Look for macroscopic evidence of life LETS camera system Observe electrostatic dust on the horizon Study change in lighting conditions and the effects of surrounding environment Aid in Earth observation and control of data collection

Communication and Data Transmission Transmission options Direct transmission used by Viking Relay from Viking Orbiter to Earth DAPU to convert data UHF linked used to transmit data at speeds of 4000 and 16000bps Transmission Criteria for LETS => 1 Earth day to transmit data Limit of no slower than 4000bps Same instrumentation to substitute from Viking Transmission Path Options Direct transmission on the Moon to Earth in sunlight Storage of data until sunlight is reached Lunar orbiter to relay data to earth