WorldCat Identities

Shafer, John F.

Overview
Works: 8 works in 22 publications in 1 language and 436 library holdings
Roles: Author
Publication Timeline
.
Most widely held works by John F Shafer
Personal radio guide : 203-83 by John F Shafer( Book )

4 editions published between 1984 and 1985 in English and held by 154 WorldCat member libraries worldwide

Field strength levels in vehicles resulting from communications transmitters by John F Shafer( Book )

3 editions published in 1984 in English and held by 133 WorldCat member libraries worldwide

Surveys of electromagnetic field intensities near representative higher-power FAA transmitting antennas by Ezra B Larsen( Book )

5 editions published in 1977 in English and held by 77 WorldCat member libraries worldwide

REPEATERS FOR LAW ENFORCEMENT COMMUNICATION SYSTEMS by Institute for Basic Standards (U.S.)( Book )

2 editions published in 1973 in English and held by 2 WorldCat member libraries worldwide

Surveys of Electromagnetic Field Intensities Near Representative Higher-Power FAA Transmitting Antennas( Book )

1 edition published in 1977 in English and held by 2 WorldCat member libraries worldwide

The National Bureau of Standards has completed surveys of electromagnetic field intensities near the antennas of typical FAA transmitters. These include aircraft radars, ground surveillance radars, instrument landing systems, navigation equipment and communication antennas. The surveys were made with rf radiation monitors having isotropic response patterns. Commercial monitors with thermocouple sensors were used to measure electric fields between 0.5 and 24 GHz and magnetic fields between 10 and 300 MHz. Probes designed at NBS with diode detectors were used for electric field between 100 kHz and 10 GHZ. These radiation monitors cannot measure (accurately) the pulse-peak field of a radar nor the field of a scanning antenna; therefore, most of the radar surveys involved fixed antennas. The intensity in the direct beam of air route surveillance radars was greater than 10 mW/sq.cm. at distances within about 14 meters from the antennas. The intensity of airport surveillance radars was above 10 mW/sq.cm. at distances within 15 meters, except for the newer ASR-8 model. The direct beam of aircraft radars exceeded 10 mW/sq.cm. at distances ranging from 2 to 7 meters. If the time-averaging effect for antenna scanning is taken into consideration, these field values would be greatly reduced. Also, the near-zone beams of FAA antennas are not normally accessible to personnel. In accessible areas the measured fields were generally less than 1 mW/sq cm. (Author)
Electromagnetic interference (EMI) measurements for automotive applications by J. W Adams( Book )

3 editions published in 1976 in English and held by 2 WorldCat member libraries worldwide

Response of barley seedlings to some foliage organisms by Jonathan N Roth( Book )

1 edition published in 1968 in English and held by 1 WorldCat member library worldwide

 
Audience Level
0
Audience Level
1
  Kids General Special  
Audience level: 0.61 (from 0.58 for Field stre ... to 0.92 for Response o ...)

Alternative Names
Shafer, J. F. (John F.)

Languages
English (22)