Minotaur i user’s guide – Orbital Minotaur I User Manual

Page 40

Minotaur I User’s Guide

Section 4.0 – Payload Environment

Table 4.8-1 lists the frequencies and maximum radiated signal levels from vehicle antennas that are
located near the payload during ground operations and powered flight. Antennas located inside the fairing
are inactive until after fairing deployment. The specific EME experienced by the payload during ground
processing at the VAB and the launch site will depend somewhat on the specific facilities that are utilized
as well as operational details. However, typically the field strengths experienced by the payload during
ground processing with the fairing in place are controlled procedurally and will be less than 2 V/m from
continuous sources and less than 10 V/m from pulse sources. Range transmitters are typically controlled
to provide a field strength of 10 V/m or less. This EME should be compared to the payload’s RF
susceptibility levels (MIL-STD-461, RS03) to define margin.

Table 4.8-1. Minotaur I Launch Vehicle RF Emitters and Receivers

Source

Function

Command

Destruct

Tracking

Transponder

Tracking

Transponder

Launch

Vehicle

Enhanced

Instrumentation

Telemetry
(Optional)

GPB

Receive/Transmit

Receive

Transmit

Receive

Transmit

Receive

Band

UHF

C-band

S-band

L-band

(L1/L2)

Frequency (MHz)

421.0

5765

5690

2288.5

2269.5

2241.5

1575.42 /

1227.6

Bandwidth

N/A

14 MHz

1.78 MHz

256 kHz

20.46 MHz

(P(Y) Code)

Power Output

N/A

400 W (peak)

N/A

10 W

5 W

N/A

Sensitivity

-107 dBm

-70 dBm

N/A

-123 dB,

Modulation

Tone

Pulse Code

PCM/FM

Spread

Spectrum

QPSK

Field Strength at

PL Interfaces

N/A

3.016 V/m Average

67.436 V/m per 0.5 µsec

<100 V/m

<60 V/m

N/A

Release 3.0

March 2014