Search Results
The search returned 1,237 publication(s) on its.ntia.gov.
This report categorizes the manner in which atmospheric stratification can complicate the problems of frequency allocation and radio regulation by inhibiting service fields and enhancing interference fields. For the United States and its border regio...
TOPOG is a computerized worldwide terrain elevation data base generation and retrieval system. It consists of software to generate TOPOG tapes from Defense Mapping Agency (DMA) standard terrain elevation data tapes, to create auxiliary random–access ...
This report describes the effort which will be undertaken to determine telecommunication standards necessary for interconnection to the United States Postal Service (USPS) planned long-range Electronic Mail Service System (EMSS). This work is in comp...
Interference to radio receivers, such as those used in radio astronomy, can present problems. Adding conventional filters to a radio astronomy receiver's input generally results in an appreciable increase in noise temperature if the filters have any ...
The solar power satellite (SPS) is a concept for generating electrical power from solar energy via a geosynchronous orbiting satellite. A facility, such as this, would be able to send approximately 5 to 10 gigawatts of power to earth on a highly focu...
The concept of collecting solar energy in an orbiting, geostationary, solar power satellite (SPS) and then beaming this power to earth via a focused microwave beam at 2.45 GHz has received considerable attention in recent years. This report examines ...
As with many technologies, the evolution of telecommunication systems is shaped by two driving forces – performance and cost. There is a real need to bridge the gap between 'performance' as perceived by the user in accomplishing a mission and 'perfor...
An automated, computer–controlled receiver system developed by ITS for the U.S. Army Communications Command provides a unique solution to such problems as spectrum management, EM hazards measurements, and site surveying. This receiving system is desi...
Thia report ia based on published cost figures of the TAT-6 submarine coaxial cable system which went into service on July 27, 1976. Assuming readiness of long wavelength (1300 nm) devices by the late 1980s, we project the expected cost of a fiber ca...
This report presents the results of mobile measurements of VHF signals in the Denver, Colorado, urban environment. The signals monitored were those received from the TV transmissions of KBTV (Channel 9), KMGH (Channel 7), KOA (Channel 4), and KWGN (C...
The Institute for Telecommunication Sciences (ITS) is the research and engineering laboratory of the National Telecommunications and Information Administration (NTIA) of the U.S. Department of Commerce (DOC). ITS provides technical support to NTIA in...
There is a growing need within the Federal government for a user-oriented, system-independent, functional means of specifying data communication performance. A recently published Federal Standard, Interim Federal Standard 1033, defines a set of stand...
Interference caused by local oscillator radiation from AM radios is a known problem. It is particularly troublesome when the local oscillator frequency of one radio coincides with the tuned frequency of another, nearby AM radio. This condition produc...
The FAA is currently developing the Discrete Address Beacon System (DABS) as an evolutionary upgrading of the Air Traffic Control Radar Beacon System (ATCRBS). Questions have been raised regarding the Electromagnetic Compatibility (EMC) of ATCRBS an...
Measurements of the amplitude probability distributions and the average crossing rates of the electromagnetic noise radiated by automotive ignition systems were made at 30 MHz, 47 MHz, 147 MHz, 224 MHz, and 445 MHz. The ignition noise from a single c...
A new, consumer–oriented family of innovative information distribution services, generically termed VIDEOTEX, is being offered to the European and Japanese public. Several field trials are underway in the U.S. Normally using a modified home TV receiv...
This report discusses microwave engineering data relevant to assess the potential of the Satellite Power System (SPS) to cause microwave field enhancements (so called "hot spots") inside habitable structures (house, trailer, car, etc.) located in th...
This report describes methods for calculating, under certain simplifying assumptions, footprints (contours of constant power density) for idealized models of several common types of transmitting antennas (circular aperture, elliptical aperture, recta...