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JSC Files on Predator Frequency Bands II

April 18, 2010

JSC-PR-04-049A
(Supersedes JSC-PR-04-049)
Joint Spectrum Center

Indian Springs C-Band Line-Of-Sight Frequency Requirements Analysis

Prepared For
Air Combat Command
UAV Special Mission Office (Acc/Dr-Uav)

January 2005.

Prepared by
Steve Bonter, Dr. William Duff, Amy Mangrum, and David Nelson
Alion Science and Technology

Distribution authorized to DoD Components only; Operational Use; January 2005.
Current frequency assignments for the Predator Unmanned Aerial Vehicle (UAV) permit the simultaneous operation of four General Atomics Aeronautical Systems Incorporated Predator air vehicles at Indian Springs Air Force Auxiliary Field (ISAFAF).

With increased operations of RQ-1/MQ-1 Predator, and the introduction of MQ-9 Hunter-Killer (Predator B®) operations, a requirement was identified for the simultaneous operation of seven Predator UAVs at ISAFAF requiring seven sets of frequencies and na additional set of frequencies for ground test. The Air Combat Command UAV Special Mission Office requested that the Joint Spectrum Center investigate alternative options that would allow all eight Predator frequency sets to operate simultaneously at the ISAFAF.

This analysis supersedes the previous version by adding high power taxi, intermodulation products analysis, and modification of the desired SSI % benchmark from 30 % SSI return link to 50 % SSI command link.

Of seven scenarios considered, two scenarios were recommended; the first, to modify the diplexer frequency band to enlarge the return link band, met the frequency requirements with unrestricted operations; the second, to improve diplexer filtering to enlarge the return link band, also met the frequency requirements.

Two other scenarios were recommended, with reservations: one considered the addition of a new tactical common datalink and the other considered the addition of a new Ku-band analog datalink (both options to be used in addition to the existing C-band datalink).

JSC-PR-04-054
Joint Spectrum Center

C-Band And Ku-Band Uav Line-Of-Sight Data Link Emc Analysis For Two Operational Scenarios

Prepared for
Office Of The Assistant Secretary Of Defense (OASD)
Networks and Information Integration (NII) Spectrum Office
October 2004

Prepared by
Steve Bonter, Diana Dunty, and Amy Mangrum
Alion Science and Technology

Distribution Authorized to DoD Components Only; Operational Use; October 2004.

The Joint Spectrum Center conducted an electromagnetic compatibility analysis to determine the potential for electromagnetic interference (EMI) between the UAV Line-of-Sight Data Link Terminal and the communications-electronics (C-E) environment near Bisbee-Douglas International Airport and Whidbey Island Naval Air Station.

This analysis included the 4400 – 4940, 5250 – 5850, and
14400 – 15350 MHz frequency bands. Each frequency band had a potential for EMI between the UAV terminals and various C-E systems in the environment. Environmental systems analyzed included, but were not limited to: radar systems (fixed and mobile), terrestrial microwave links, telemetry systems, satellite downlink systems, and radio astronomy telescopes. Where potential EMI was
noted, mitigation techniques were recommended. The data presented in this report was current as of 8 September 2004

JSC-CR-03-062
Joint Spectrum Center

Predator UAV Line-Of-Sight Data Link Terminal Radio Frequency Test Plan

Prepared for
UAV Special Mission Office (ACC/DR-UAV)
August 2003

Prepared by
Steve Bonter, Young Kim, and John Smith
Alion Science and Technology

Distribution authorized to US Government agencies only; Test & Evaluation; August 2003.

The Predator Unmanned Aerial Vehicle (UAV) line-of-sight (LOS) command link (CL) and return link (RL) frequency assignments permit simultaneous operations of four General Atomics Aeronautical Systems Incorporated (GA-ASI) Predator air vehicles at Indian Springs Air Force Auxiliary Field (ISAFAF).

With increased operations of RQ-1/MQ-1 Predator and the introduction of MQ-9 Hunter-Killer (Predator B®) operations, a requirement was identified for simultaneous operations of seven Predator UAVs at ISAFAF and an eighth set of frequencies for ground test.

The Air Combat Command UAV Special Mission Office (ACC/DR-UAV) requested that the Joint Spectrum Center (JSC) investigate ways to satisfy the eight Predator frequency requirement. The JSC, with support from Aeronautical Systems Center (ASC/RAB) and GA-ASI, will perform transmitter emission bandwidth, transmitter broadband noise, receiver sensitivity, receiver selectivity, receiver adjacent-signal rejection, and receiver gain compression measurements of the data link terminals. This test plan was developed to support the test efforts.

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