Civil Input to GPS III

1
Civil InputtoGPS III

• PNT Advisory Board Meeting
• 16 Oct 08

HQ AFSPC Mr. Hank Skalski, OST Col Dave Buckman,
A5P Peterson AFB, CO
2
Overview

• Purpose
• Interagency Requirements Process (IRP)
• Nominal IFOR Approval Cycle
• Overall Approval Process
• GPS IIIB CDD Schedule
• Geodetic Requirement (Satellite Laser Reflectors
  SLRs)
• Distress Alerting Satellite System (DASS)
• Wrap Up

3
Purpose

• Describe GPS interagency requirements process
• Provide information on candidate GPS
  requirements/payloads
• Geodetic
• DASS

4
Interagency Requirements Process
5
Nominal IFOR Approval Cycle
Incorporate into GPS Reqts Documents
Send to IFOR For Review
Receive Reqt AoA
Prepare Package for Co-Chairs
Approve or Send for Rework
Resolve Comments
Day 105
Day 0
Days 1-60
Days 61-90
Days 91-104
Dependent on Reqt Cycle
Enter JCIDS Process

• Nominal Cycle Time is 105 days plus time
• associated with preparing documents
• Following document preparation, requirement
• documents (such as CDDs) will enter JCIDS
  process

6
Overall Approval Process
7
GPS IIIB CDD Schedule
8
New Requirements - Geodetic

• Geodetic Requirements
• Achieve a stable geodetic reference frame with an
  accuracy at least ten times better than
  anticipated user requirements
• Maintain a close alignment of the WGS84 reference
  frame with the International Terrestrial
  Reference Frame
• Provide a quality assessment capability
  independent of current radiometric measurement
  used to determine GPS orbits and clock
  performance
• Ensure interoperability of GPS with other GNSSs
  through a common, independent measurement
  technique

9
Geodetic Requirements Status

• Requirements and AoA submitted to IFOR - Apr 07
• One GPS-based alternative (Satellite Laser
  Reflectors) with other non-GPS alternatives
• Sent out for review Apr 07
• No critical/substantive comments received
• Many favorable comments received
• IFOR letter to NASA approving Geodetic
  Requirements for inclusion in GPS IIIB CDD prior
  to entering JCIDS process Aug 07
• GPSW analysis had not been accomplished
• IFOR Requested GPSW review for GPS III satellite
  impacts
• White papers provided in Jun 08 opposing
  implementation on SVs, but also provided possible
  solutions
• Geodetic Requirements Working Group chartered by
  IFOR

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Geodetic Requirements Working Group

• Intent is to fully explore all security, cost,
  and technical issues prior to entering the JCIDS
  process
• First meeting held 17 July 08
• Attended by representatives from NASA, USGS, NRL,
  NGA, DOT, USNO, SAF/USA, AF/A5R, GPSW, AFTAC and
  AFSPC/A5P
• Created roadmap to resolve issues
• Additional Technical Meeting held 26 Aug 08 to
  further explore technical issues
• Next meeting Nov 08

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Geodetic Approval Cycle
Prepare Package for Co-Chairs
Approve or Send for Rework
Approved for IIIB CDD
Send to IFOR For Review
Receive Reqt AoA
Comment Resolution
GPSW Analysis Comment Resolution
Enter JCIDS Process

• Requirements submitted Apr 07
• IFOR approval Aug 07
• Did not include GPSW analysis
• GPSW analysis provided Jun 08
• Currently working identified technical issues
• Anticipated completion 1 Dec 08

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Distress Alerting Satellite System (DASS)

• The United States Government, specifically the
  U.S. Coast Guard, Department of Defense, and the
  National Oceanic and Atmospheric Administration,
  requires an enduring space-based capability to
  detect, locate, and relay distress alerts from
  emergency beacons carried by aviators, mariners
  and land-based users to search and rescue
  services.
• The federal government requires a capability
• To support the general public
• To support civilian SAR efforts of the USCG and
  DoD worldwide
• To support military SAR operations worldwide
• To meet international obligations under the
  Chicago Convention

13
DASS Status

• Requirements and AoA received 28 Jul 08
• Not a GPS or PNT requirement would be a
  secondary payload
• Package sent out for IFOR review 1 Aug 08,
  comments due 1 Oct 08
• Letter supporting requirements received from
  Joint Personnel Recovery Agency
• Comments received and being adjudicated
• GPSW performing cost and technical analysis
• USAF Red Team conducting national security
  analysis

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DASS Approval Cycle
Send to IFOR for Review
Receive Reqt AoA
Prepare Package for Co-Chairs
Approve or Send for Rework
Approved for IIIB CDD
Comment Resolution
Day 105
Day 0
Days 61-90
Days 91-104
Days 1-60
Enter JCIDS Process
Task GPSW for Analysis

• Requirements and AoA received Jul 08
• Comments received Oct 08
• In Comment Resolution
• GPSW still conducting cost/technical analysis
• Anticipated completion Dec 08

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Wrap Up

• Flexibility in the requirements development
  process is key one size doesnt fit all
• Geodetic and DASS requirements are being
  processed through the IFOR
• Each has unique issues that require slightly
  different handling