Holography, Raster Scan, and Stability Measurements of NASA-JPL Deep Space Network Antennas
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Holography Raster Scan Antennas↗
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NASA's Deep Space Network: An Instrument for Scientific Research
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DSN protostar formation molecular spectroscopy↗
A Study of Phased Array Antennas for NASA's Deep Space Network
In this paper we briefly discuss various options but focus on the feasibility of the phased arrays as a viable option for this application. Of particular concern and consideration will be the cost, reliability, and performance compared to the present 70-meter antenna system, particularly the gain/noise temperature levels in the receive mode. Many alternative phased arrays including planar horizontal arrays, hybrid mechanically/electronically steered arrays, phased array of mechanically steered reflectors, multi-faceted planar arrays, phased array-fed lens antennas, and planar reflect-arrays are compared and their viability is assessed. Although they have many advantages including higher reliability, near-instantaneous beam switching or steering capability, the cost of such arrays is presently prohibitive and it is concluded that the only viable array options at the present are the arrays of a few or many small reflectors. The active planar phased arrays, however, may become feasible options in the next decade and can be considered for deployment in smaller configurations as supplementary options.
Deep Space Network (DSN)↗
Solutions Network Formulation Report. Using NASA Sensors to Perform Crop Type Assessment for Monitoring Insect Resistance in Corn
The EPA (U.S. Environmental Protection Agency) is tasked to monitor for insect pest resistance to transgenic crops. Several models have been developed to understand the resistance properties of insects. The Population Genetics Simulator model is used in the EPA PIRDSS (Pest Infestation and Resistance Decision Support System). The EPA Office of Pesticide Programs uses the DSS to help understand the potential for insect pest resistance development and the likelihood that insect pest resistance will negatively affect transgenic corn. Once the DSS identifies areas of concern, crews are deployed to collect insect pest samples, which are tested to identify whether they have developed resistance to the toxins in transgenic corn pesticides. In this candidate solution, VIIRS (Visible/Infrared Imager/Radiometer Suite) vegetation index products will be used to build hypertemporal layerstacks for crop type and phenology assessment. The current phenology attribute is determined by using the current time of year to index the expected growth stage of the crop. VIIRS might provide more accurate crop type assessment and also might give a better estimate on the crop growth stage.
Lewis, David↗
Automating Mid- and Long-range Scheduling for NASA's Deep Space Network
No abstract available
Deep Space Network↗
NASA's Deep Space Network: Big Antennas with a Big Job
No abstract available
Deep Space Network (DSN)↗
Software Defined Radio Developments and Verification for Space Environment on NASAs Communication Navigation, and Networking Testbed(CoNNeCT)
No abstract available
Reinhart, Richard↗
Fireballs and Meteor Showers as Seen by the NASA All Sky Fireball Network
No abstract available
Moorhead, Althea↗
Overview: NASA All Sky Fireball Network & Southern Ontario Meteor Network
No abstract available
Moser, Danielle E.↗
Designing for Situation Awareness and Operator Control with Large Data Volumes in NASA's Deep Space Network
No abstract available
Holloway, Alexandra↗
Prioritization and Oversubscribed Scheduling for NASA's Deep Space Network
No abstract available
Shouraboura, Caroline↗
NASA ION (Interplanetary Overlay Network) Developer Course Materials
The Delay/Disruption Tolerant Networking Project created open-source software, the Interplanetary Overlay Network (ION), as an implementation of the Bundle Protocol. To aid users in understanding the architecture of ION and how best to use it, the DTN Project developed a course.
DTN↗
NASA's Deep Space Network (DSN): Concept for Integrating the DSN with the Caltech ShakeAlert Pilot Project
No abstract available
Hames, Peter↗
Holographic Measuremenst of the NASA-JPL Deep Space Network Antennas
Microwave holography, as applied to reflector antennas, is a technique which urtilizes the Fourier Transform relation between the complex far-field radiation pattern of an antenna and the complex aperture distribution.
Holographics↗