The WAAS ionospheric threat model
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WAAS ionosphere↗
Engineering topics
Fries, R.
Publications and source records attributed to Fries, R..
Assessing the threat of undersampled ionospheric irregularities for wide area differential GPS systems
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correction↗
Robust detection of ionospheric irregularities
The approach outlined in this paper conservatively bounds the ionospheric errors even for the worst observed ionospheric conditions to date, using data sets taken from the operational receivers in the WAAS reference station network.
Wide Area Augmentation System (WAAS) ionosphere ir↗
LANDSAT D: Applications development laboratory study
As the Earth Resources Program has matured through the LANDSAT spacecraft it has begun the transition from an experimental research activity to a sound demonstration of proven utility. This important transition will be complete with the LANDSAT D system which incorporates several key improvements over the current system. These improvements, based on experience with the existing LANDSATs, will provide new capabilities in the spacecraft, the sensor, the ground system, and the overall system design.
Alexander, L.↗
TERSSE. Definition of the total earth resources system for the shuttle era. Volume 10: (TOSS) TERSSE operational system study
Economic benefits studies regarding the application of remote sensing to resource management and the Total Earth Resources for the Shuttle Era (TERSSE) study to outline the structure and development of future systems are used, along with experience from LANDSAT and LACIE, to define the system performance and economics of an operational Earth Resources system. The system is to be based on current (LANDSAT follow-on) technology and its application to high priority resource management missions, such as global crop inventory. The TERSSE Operational System Study (TOSS) investigated system-level design alternatives using economic performance as the evaluation criterion. As such, the TOSS effort represented a significant step forward in the systems engineering and economic analysis of Earth Resources programs. By parametrically relating engineering design parameters, such as sensor performance details, to the economic benefit mechanisms a new level of confidence in the conclusions concerning the implementation of such systems can be reached.
Stow, W. K.↗