Accession Number:

AD0647056

Title:

A DUAL-CHANNEL, VHF-UHF TRANSMITTER FOR GEMINI EXPERIMENT D-14.

Descriptive Note:

Interim rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

• Leef,A. E.

Report Date:

1967-01-23

Pagination or Media Count:

30.0

Abstract:

The objective of Gemini experiment D-14 was to measure the electron content of the ionosphere below the Gemini spacecraft by means of a dual-frequency Faraday rotation experiment utilizing two spacecraft-borne transmitters operating in the vhf-uhf bands. The Model NT-1 dual-channel solid-state transmitter was designed for this experiment. The transmitter produces, simultaneously, four watts of rf energy at 133.9 Mc and two watts at 401.7 Mc. This transmitter is a highly ruggedized unit capable of operation under the severe vibration and temperature requirements of spacecraft environment. This power output was necessary in order to obtain The spacecraft-borne transmitters supplied at least one watt of cw rf energy at each frequency for simultaneoous radiation from a colinear dipole antenna. This power output was necessary in order to obtain the desired signal-to-noise ratios at the ground-based receiving stations for accurate measurements. Author

Descriptors:

• *RADIO TRANSMITTERS
• SPACEBORNE
• SPACE COMMUNICATIONS
• MULTIPLE OPERATION
• VERY HIGH FREQUENCY
• ULTRAHIGH FREQUENCY
• SIGNAL TO NOISE RATIO
• MANNED SPACECRAFT
• PERFORMANCE(ENGINEERING)

Subject Categories:

• Manned Spacecraft
• Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE