request for information from Jose Trevino

0478-EX-PL-2008 Text Documents

SAIC

2008-12-18ELS_95263

FCC file number:        0478-EX-PL-2008
Confirmation #:         EL397592
Submission Date:        24 November, 2008

                                                                          Date: 17 December, 2008

Re:      Request for information
         Correspondence reference # 7829
         From: Jose Trevino (Jose.Trevino@fcc.gov)



Dear Jose,

Thank you for your efforts to proceed speedily with our application for an experimental license.
This note is in response to your request for additional information to address Section 8.3.28 of
the NTIA Manual.


      1. Our request is for an individual authorization on a fixed device that re-radiates GPS
         signals. The re-radiator will be used strictly indoors at the laboratory facility located in
         Manassas, Virginia.
      2. na – application is not for frequency assignment
      3. na – application is not for frequency assignment
      4. na – application is not for frequency assignment
      5. The repeater space is a single level laboratory and office facility under the strict and
         constant control of SAIC. Over the duration of the license, the repeater is expected to be
         turned on only during normal working hours though it may be in occasional use during
         off-hours, for example the early evening hours or occasional weekend use. It is further
         anticipated that the long term average on-time of the repeater would be in the vicinity of
         10-20% of a normal working day.
      6. The manufacturer of the repeater system is GPS Source, Inc. located in Pueblo, CO.
         SAIC has purchased one of their standard L1/L2 repeater kits incorporating 50’ of
         premium grade, 50 ohm cable. All calculations supplied by the manufacturer are
         presented below and include the cable losses along with the repeater power at the
         specified range of 100’. As required, these calculations are for free space propagation
         and do not account for any attenuation by the building structure. For the repeater system
         to be used, Table I provides the ERP at 100’ as 6.9x10-11 watts which translates to -143
         dBm, in compliance with the NTIA requirement.
      7. All GPS users within the facility and area of potential interference are being notified of
         the repeater installation. SAIC real estate and the facility landlord have been notified.
      8. The equipment to be tested will be government furnished military SAASM receiver cards
         with some preliminary work with commercial GPS receiver cards. The specific details
         regarding manufacturer and model numbers can be supplied if desired.
      9. The facility point of contact will be
                 Brian Hilko
                 Off: 571-921-3073
                 Res: 703-765-6512


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Please let me know if there is any additional information that you require and I will respond as
quickly as possible.

Best Regards
Brian

Dr Brian Hilko
SAIC
10110 Battleview Parkway, Suite 100
Manassas, VA 20109

off: 571-921-3073
cell: 301-326-7259
fax: 703-676-1461
hilkob@saic.com


                        TABLE I – Repeater power budget calculations.




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TABLE II – Attenuation through purchased co-axial cable.




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Document Created: 2008-12-18 13:34:12
Document Modified: 2008-12-18 13:34:12

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