http://hdl.handle.net/10150/578435 2026-04-11T12:01:42Z http://hdl.handle.net/10150/666505 International Telemetering Conference Proceedings, Volume 07 (1971) International Telemetering Conference Proceedings / September 27-29, 1971 / Washington Hilton Hotel, Washington, D.C. 1971-09-01T00:00:00Z http://hdl.handle.net/10150/607066 Appendix A: Tenth Annual Report of the Telemetering Standards Coordination Committee Pruss, Hugh International Telemetering Conference Proceedings / September 27-29, 1971 / Washington Hilton Hotel, Washington, D.C. 1971-09-01T00:00:00Z http://hdl.handle.net/10150/607064 VHF/UHF Stellar Calibration Error Analysis Taylor, Ralph E.; Stocklin, Frank J. A statistical error analysis is performed to determine the degree of uncertainty encountered when calibrating steerable VHF /UHF receiving antennas with the stellar calibration method. The analysis considers the propagation of precision error indexes. It is shown that an antenna gain calibration by the stellar method has a one-sigma (1σ) uncertainty of ±0.65 dB at 1440 MHz (L-band), and ±0.8 dB (1σ) at 136 MHz (VHF). Somewhat increased precision can be achieved by monitoring the antenna gain-to-noise temperature (G/T) ratio at a station; a worst-case uncertainty of ±0.4 dB (1σ) can be realized at both L-band and VHF. Finally, field test measurements of antenna gain, obtained at 136 MHz in the NASA space tracking and data acquisition network (STADAN), demonstrate an uncertainty of ±1.0 dB, or less, which effectively confirms the analytical result. International Telemetering Conference Proceedings / September 27-29, 1971 / Washington Hilton Hotel, Washington, D.C. 1971-09-01T00:00:00Z http://hdl.handle.net/10150/607062 A 2-kw S-Band Re-Entry Telemetry System Trapp, D. L.; Williams, P. K. Instrumentation of high-velocity re-entry rocket systems at Sandia Laboratories has been complicated because of dependence on onboard magnetic tape recorders to store data until the carrier emerges from the radiofrequency blackout. This paper describes an approach designed to minimize the effect of the RF blackout by means of employing a sampled data system the output of which consists of 1-μsec pulses of 2-kw RF power level. The effort was initiated in the spring of 1970 for the purpose of obtaining real-time data during the re-entry blackout phase of a Sandia re-entry flight test. Re-entry velocities in the vicinity of 25,000 fps are expected. International Telemetering Conference Proceedings / September 27-29, 1971 / Washington Hilton Hotel, Washington, D.C. 1971-09-01T00:00:00Z