NAVCEN Website User: On or about July 7th, the Navigation Center website will be migrated to a new architecture. As a result, most saved bookmarks and links will likely be broken and unusable. We apologize for any inconvenience and ask that you bear with us while we migrate to improve our site. If you have any questions, please contact the Navigation Center at the following URL, and select "Other" on the pull down menu next to "Subject". http://www.navcen.uscg.gov/misc/NIS_contact_us.htm Than ...Continue Reading

GPS OPERATIONAL ADVISORY 180 SUBJ: GPS STATUS 29 JUN 2010 1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM): A. BLOCK I : NONE B. BLOCK II: PRNS 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 PLANE : SLOT B6, D1, C2, D4, E6, C6, A4, A3, A1, E3, D2, B4, F3, F1 CLOCK : RB, RB, CS, RB, RB, RB, RB, CS, CS, CS, RB, RB, RB, RB BLOCK II: PRNS 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28 PLANE : SLOT F2, B1, C4, E4, C3, E1, D3, E2, F4, D5, B2, F5, A6, B3 CLOCK : RB, RB, ...Continue Reading

GPS OPERATIONAL ADVISORY 179 SUBJ: GPS STATUS 28 JUN 2010 1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM): A. BLOCK I : NONE B. BLOCK II: PRNS 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 PLANE : SLOT B6, D1, C2, D4, E6, C6, A4, A3, A1, E3, D2, B4, F3, F1 CLOCK : RB, RB, CS, RB, RB, RB, RB, CS, CS, CS, RB, RB, RB, RB BLOCK II: PRNS 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28 PLANE : SLOT F2, B1, C4, E4, C3, E1, D3, E2, F4, D5, B2, F5, A6, B3 CLOCK : RB, RB, ...Continue Reading

GPS OPERATIONAL ADVISORY 178 SUBJ: GPS STATUS 27 JUN 2010 1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM): A. BLOCK I : NONE B. BLOCK II: PRNS 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 PLANE : SLOT B6, D1, C2, D4, E6, C6, A4, A3, A1, E3, D2, B4, F3, F1 CLOCK : RB, RB, CS, RB, RB, RB, RB, CS, CS, CS, RB, RB, RB, RB BLOCK II: PRNS 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28 PLANE : SLOT F2, B1, C4, E4, C3, E1, D3, E2, F4, D5, B2, F5, A6, B3 CLOCK : RB, RB, ...Continue Reading

GPS OPERATIONAL ADVISORY 177 SUBJ: GPS STATUS 26 JUN 2010 1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM): A. BLOCK I : NONE B. BLOCK II: PRNS 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 PLANE : SLOT B6, D1, C2, D4, E6, C6, A4, A3, A1, E3, D2, B4, F3, F1 CLOCK : RB, RB, CS, RB, RB, RB, RB, CS, CS, CS, RB, RB, RB, RB BLOCK II: PRNS 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28 PLANE : SLOT F2, B1, C4, E4, C3, E1, D3, E2, F4, D5, B2, F5, A6, B3 CLOCK : RB, RB, ...Continue Reading

NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2010100 SUBJ: SVN33 (PRN03) UNUSABLE JDAY 175/1934 - JDAY 175/1948 1. NANU TYPE: UNUNOREF NANU NUMBER: 2010100 NANU DTG: 242003Z JUN 2010 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 33 PRN: 03 START JDAY: 175 START TIME ZULU: 1934 START CALENDAR DATE: 24 JUN 2010 STOP JDAY: 175 STOP TIME ZULU: 1948 STOP CALENDAR DATE: 24 JUN 2010 2. CONDITION: GPS SATELLITE SVN33 (PRN03) WAS UNUSABLE ON JDAY 175 (24 JUN 2010) BEGINNING 1934 ZU ...Continue Reading

GPS OPERATIONAL ADVISORY 176 SUBJ: GPS STATUS 25 JUN 2010 1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM): A. BLOCK I : NONE B. BLOCK II: PRNS 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 PLANE : SLOT B6, D1, C2, D4, E6, C6, A4, A3, A1, E3, D2, B4, F3, F1 CLOCK : RB, RB, CS, RB, RB, RB, RB, CS, CS, CS, RB, RB, RB, RB BLOCK II: PRNS 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28 PLANE : SLOT F2, B1, C4, E4, C3, E1, D3, E2, F4, D5, B2, F5, A6, B3 CLOCK : RB, RB, ...Continue Reading

NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2010101 SUBJ: SVN56 (PRN16) UNUSABLE JDAY 175/1614 - JDAY 176/0109 1. NANU TYPE: UNUSABLE NANU NUMBER: 2010101 NANU DTG: 250131Z JUN 2010 REFERENCE NANU: 2010099 REF NANU DTG: 241724Z JUN 2010 SVN: 56 PRN: 16 START JDAY: 175 START TIME ZULU: 1614 START CALENDAR DATE: 24 JUN 2010 STOP JDAY: 176 STOP TIME ZULU: 0109 STOP CALENDAR DATE: 25 JUN 2010 2. CONDITION: GPS SATELLITE SVN56 (PRN16) WAS UNUSABLE ON JDAY 175 (24 JUN 2010) ...Continue Reading

NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2010099 SUBJ: SVN56 (PRN16) UNUSABLE JDAY 175/1614 - UNTIL FURTHER NOTICE 1. NANU TYPE: UNUSUFN NANU NUMBER: 2010099 NANU DTG: 241724Z JUN 2010 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 56 PRN: 16 START JDAY: 175 START TIME ZULU: 1614 START CALENDAR DATE: 24 JUN 2010 STOP JDAY: UFN STOP TIME ZULU: N/A STOP CALENDAR DATE: N/A 2. CONDITION: GPS SATELLITE SVN56 (PRN16) WILL BE UNUSABLE ON JDAY 175 (24 JUN 2010) BEGINNING 1614 Z ...Continue Reading

GPS OPERATIONAL ADVISORY 175 SUBJ: GPS STATUS 24 JUN 2010 1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM): A. BLOCK I : NONE B. BLOCK II: PRNS 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 PLANE : SLOT B6, D1, C2, D4, E6, C6, A4, A3, A1, E3, D2, B4, F3, F1 CLOCK : RB, RB, CS, RB, RB, RB, RB, CS, CS, CS, RB, RB, RB, RB BLOCK II: PRNS 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28 PLANE : SLOT F2, B1, C4, E4, C3, E1, D3, E2, F4, D5, B2, F5, A6, B3 CLOCK : RB, RB, ...Continue Reading