Search Results
The search returned 1,237 publication(s) on its.ntia.gov.
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...
Measurements were performed in an urban-suburban environment with narrowband and wideband RF probes, which include millimeter-wave frequencies, in order to study propagation characteristics for street level paths. The primary objective of this report...
This report describes a new and unique approach for modeling either narrowband or wideband high frequency (HF) channels. Although narrowband models of the HF channel have existed for many years, they are applicable to only a limited set of actual pro...
This report documents an analysis of the probability of interference from systems in the space services to aeronautical telemetry system using the 2200–2290 MHz band. These calculated results may be used to determine the coordination requirements fo...
This report details a study on the application of American National Standards X3.l02 and X3.l4l to various classes of communication satellite systems from the simple analog "bent–pipe" to NASA's Advanced Communications Technology Satellite (ACTS). Th...
The NITA Information Services Report is a study of the information services available via telecommunications networks in the United States and a number of foreign countries. It presents a review of the information services available in the United Sta...
This report describes a new technique for calculating the spectrum space used by existing frequency assignments. The Spectrum Use Measure (SUM) model determines the amount of spectrum used at a given location or the probability that a given location ...
An interactive program has been developed to evaluate the performance of medium frequency (MF) broadcasting systems. The model calculates both ground–wave and sky–wave signals. The user can select from three ground–wave methods: (1) smooth Earth, hom...
This report presents results of a multiyear data communication performance measurement program conducted at the Institute for Telecommunication Sciences, the research and engineering arm of the National Telecommunications and Information Administrati...
A brief overview of nuclear radiation processes is presented. Units of radiation energy and dose are discussed. Interactions of radiation processes with matter are analyzed in order to understand radiation and its energy. Range is discussed in rel...
The bulk, or effective, dielectric constant of any background test medium (whether naturally occurring or synthetic) determines the electromagnetic visibility of buried objects. Heuristic mixing rules are considered that allow the prediction of comp...
Important changes in the video market, particularly with respect to cable television over the last ten years, have raised several policy issues. The expanded technological capabilities of optical fibers and computers create new ways to transport and...
Interference coefficients describe the non-Lorentzian effect that arises as pressure broadening causes lines to overlap. These coefficients, one for each line, are at moderate pressures related linearly to absorption and dispersion. They are determin...
The Mu1itier Specification was developed to provide guidelines and recommendations for improving the durability of the communication installations necessary for National Security/Emergency Preparedness (NSEP). The application of the Multitier Specifi...
This report discusses propagation and performance measurements that were obtained over a digital troposcatter communication link between Bocksberg, West Germany, and West Berlin. The measurements were unusual because three general types of data were ...
Minimum (or “best–fit”) elliptical beams of satellite antennas have been used for the planning of space services utilizing the geostationary–satellite orbit. In such a planning, beam parameters of minimum elliptical beams are necessary for all possi...
Fiber optic telecommunication systems are susceptible to both natural and man-made stress. national Security/Emergency Preparedness (NSEP) is a function of how durable these systems are in light of projected levels of stress. Emergency Preparedness ...
Fiber optic telecommunication systems are susceptible to both natural and man-made stress. national Security/Emergency Preparedness (NSEP) is a function of how durable these systems are in light of projected levels of stress. Emergency Preparedness ...
The National Communications System (NCS) is responsible for defining reasonable enhancements that could be applied to commercial common carrier (or carriers’–carrier) fiber optic systems that will be leased or owned by government agencies and which m...