THE 2nd SPACE THE 2nd SPACE OPERATIONS SQUADRONOPERATIONS SQUADRON

Capt Heather EastlackCapt Heather Eastlack

NANUS

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Introduction

• 2 SOPS NANU overview• History • Description• Format Samples

• FCSTMX changes

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NANU Description

2 SOPS generates a Notice Advisory to NAVSTAR Users (NANU) message to inform

military and civil users of events affecting GPS constellation navigation payload status

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NANU History

• Civil community through on site support personnel convince GPS operational support personnel that outage notices need to be published in 1984

• GPS operational support personnel collaborate and code NANU outage distribution software in 1986

• United States Coast Guard (USCG) receives NANUs and upgrades USCG radio broadcasts to include NANUs in 1988

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NANU History

• Requirement established to report GPS degradation below a certain level in 1989.

• Worldwide navigation users (civilian and military) increased to infinite numbers as utility is established 1988-Present

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NANU History

• MOA established between Department of Transportation (DOT) and Department of Defense (DOD) in Jan 1993

– Annex 1 DOT Representation at the GPS JPO and AFSPACECOM added in Jun 1993– Annex 2 Second Coded Civil GPS Signal added in Jul 1997 – Annex 3 Information Coordination and Dissemination added in Jul 1999 – Annex 4 Implementing Unique Civil Requirements added in Aug 2000

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NANU History

• The legacy GPS User Support System (GUSS) was PC-based and developed as an offline tool to automate NANU generation in 1995

– Notified worldwide users of satellite outages, return to service, and general GPS information

• MOA established between United States Air Force Space Command (AFSPACECOM) and USCG in Feb 1996

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NANU History

• Intranet-based GUSS was developed to provide enhanced automation and be compliant with LAN policies regarding software/hardware requirements

– VV&A in 2001– Related MCB occurred in Jan 2002

• Awaiting 1067 validation for AEP version of GUSS

– Related MCB occurred in Jan 2002

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NANU Types

• Scheduled outages• Unscheduled outages• General• Classified• Others

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NANU Types

• Scheduled outages• FCSTDV• FCSTMX• FCSTCANC• FCSTRESCD• FCSTEXTD• FCSTSUMM

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NANU Samples

NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYNNNSUBJ: SVNxx (PRNXX) FORECAST OUTAGE JDAY JJJ/HHMM - JDAY JJJ/HHMM1. NANU TYPE: FCSTDV NANU NUMBER: YYYYNNN NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: N/A REF NANU DTG: N/A SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: JJJ STOP TIME ZULU: HHMM STOP CALENDAR DATE: DD MMM YYYY

2. CONDITION: GPS SATELLITE SVNXX (PRNXX) WILL BE UNUSABLE ON JDAY JJJ (DD MMM YYYY) BEGINNING HHMM ZULU UNTIL JDAY JJJ (DD MMM YYYY) ENDING HHMM ZULU.

3. POC: CIVILIAN - NAVCEN AT (703)313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center, DSN 560-2541, COMM 719-567-2541, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS

Forecast Delta V

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NANU Samples

NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYNNNSUBJ: SVNxx (PRNXX) FORECAST OUTAGE JDAY JJJ/HHMM - JDAY JJJ/HHMM1. NANU TYPE: FCSTDV NANU NUMBER: YYYYNNN NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: N/A REF NANU DTG: N/A SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: JJJ STOP TIME ZULU: HHMM STOP CALENDAR DATE: DD MMM YYYY

2. CONDITION: GPS SATELLITE SVNXX (PRNXX) WILL BE UNUSABLE ON JDAY JJJ (DD MMM YYYY) BEGINNING HHMM ZULU UNTIL JDAY JJJ (DD MMM YYYY) ENDING HHMM ZULU.

3. POC: CIVILIAN - NAVCEN AT (703)313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center, DSN 560-2541, COMM 719-567-2541, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS

Forecast Delta V

NANU Description

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NANU Samples

NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYNNNSUBJ: SVNxx (PRNXX) FORECAST OUTAGE JDAY JJJ/HHMM - JDAY JJJ/HHMM1. NANU TYPE: FCSTDV NANU NUMBER: YYYYNNN NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: N/A REF NANU DTG: N/A SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: JJJ STOP TIME ZULU: HHMM STOP CALENDAR DATE: DD MMM YYYY

2. CONDITION: GPS SATELLITE SVNXX (PRNXX) WILL BE UNUSABLE ON JDAY JJJ (DD MMM YYYY) BEGINNING HHMM ZULU UNTIL JDAY JJJ (DD MMM YYYY) ENDING HHMM ZULU.

3. POC: CIVILIAN - NAVCEN AT (703)313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center, DSN 560-2541, COMM 719-567-2541, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS

Forecast Delta V

Reference Information

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NANU Samples

NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYNNNSUBJ: SVNxx (PRNXX) FORECAST OUTAGE JDAY JJJ/HHMM - JDAY JJJ/HHMM1. NANU TYPE: FCSTDV NANU NUMBER: YYYYNNN NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: N/A REF NANU DTG: N/A SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: JJJ STOP TIME ZULU: HHMM STOP CALENDAR DATE: DD MMM YYYY

2. CONDITION: GPS SATELLITE SVNXX (PRNXX) WILL BE UNUSABLE ON JDAY JJJ (DD MMM YYYY) BEGINNING HHMM ZULU UNTIL JDAY JJJ (DD MMM YYYY) ENDING HHMM ZULU.

3. POC: CIVILIAN - NAVCEN AT (703)313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center, DSN 560-2541, COMM 719-567-2541, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS

Forecast Delta V

Satellite Identification

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NANU Samples

NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYNNNSUBJ: SVNxx (PRNXX) FORECAST OUTAGE JDAY JJJ/HHMM - JDAY JJJ/HHMM1. NANU TYPE: FCSTDV NANU NUMBER: YYYYNNN NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: N/A REF NANU DTG: N/A SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: JJJ STOP TIME ZULU: HHMM STOP CALENDAR DATE: DD MMM YYYY

2. CONDITION: GPS SATELLITE SVNXX (PRNXX) WILL BE UNUSABLE ON JDAY JJJ (DD MMM YYYY) BEGINNING HHMM ZULU UNTIL JDAY JJJ (DD MMM YYYY) ENDING HHMM ZULU.

3. POC: CIVILIAN - NAVCEN AT (703)313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center, DSN 560-2541, COMM 719-567-2541, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS

Forecast Delta V

Outage Times

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NANU Types

• Unscheduled outages• UNUSUFN• UNUSABLE• UNUNOREF

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NANU Samples

2004021------------------------1. NANU TYPE: GENERAL*** GENERAL MESSAGE TO ALL GPS USERS ***

GPS Satellite SVN23 (PRN23) was decommissioned from active service on JDAY044 (13 Feb 04) as of 2200z. PRN23 is available for future satellite vehicles.

*** GENERAL MESSAGE TO ALL GPS USERS ***

General

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NANU Samples

Classified

Agencies with the proper clearance will receive this NANU. CLASNANUs will never have a

NANU number. An example of the content of a CLASNANU is a Selective Availability or Anti-

Spoof change.

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NANU Types

• Others• USABINIT• LEAPSEC

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NANU Recent Issues

• SVN23 & SVN36 FCSTMX outages

• Required UFN end times• Capability does not exist• User community not informed if change was made at that time

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NANU Upgraded Capabilities

• FCSTMX NANU end time UFN enabled

• User community informed NLT 1 month prior to implementation

• GENTEXT NANU

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Summary

• 2 SOPS NANU • History • Description• Format Samples

• FCSTMX changes

The 2nd Space Operations SquadronThe 2nd Space Operations Squadron

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