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Mission & Vision
Naval Oceanographic Office
Fleet Numerical Meteorology & Oceanography Center
United States Naval Observatory
News from the Naval Observatory
Earth Orientation Department
USNO Earth Orientation Products
Contents of Bulletin A
USNO GPS Products
GPS User Information
USNO VLBI-based Products
VLBI Correlator Data
VLBI-based Earth Orientation Parameters (EOP)
Earth Orientation Information Center
General Information about Earth Orientation
Frequently Asked Questions About Earth Orientation
What Is Earth Orientation?
What Is Polar Motion?
What does the Earth rotation coordinate measure?
What is the Celestial Pole Offset?
What is a Leap Second?
How do we measure Earth Orientation?
What causes variations in the Earth's orientation?
Who uses Earth orientation information?
Publications About Earth Orientation Products
Earth Orientation Software
Precise Time Department
The USNO Master Clock
The USNO Master Clock
Time Dissemination at the USNO
USNO Alternate Master Clock (AMC)
Cesium Atomic Clocks
Hydrogen Masers at the USNO
Rubidium Fountain Clocks
USNO Time Scales
International Time Scales and the BIPM
Definitions of Systems of Time
Global Positioning System
Global Positioning System Overview
USNO GPS Data Categories Explanation
CGGTTS Data Format
USNO GPS Time Transfer
GPS Information: SA, DGPS, Leap Seconds, etc.
GPS Week Number Rollover
GPS Timing Data and Information
USNO Format Explanation
USNO Computer Display Clocks
Two-Way Satellite Time Transfer (TWSTT)
Network Time Protocol (NTP)
US Eastern Time Zone NTP Servers
US Mountain Time Zone Servers
DoD Customer Servers
Astronomical Applications Department
Celestial Reference Frame Department
Senior Enlisted Advisor
Naval Oceanography Operations Command
Fleet Weather Center - Norfolk
Fleet Weather Center - San Diego
Joint Typhoon Warning Center
Public Use of Limitations
Naval Meteorology and Oceanography Command
AGCM (IW/AW/SW) Joel Dan “JD” Seaney
Command-Master-Chief, Naval Oceanography Anti-Submarine Warfare Center
14 June 2022
Master Chief Aerographer’s Mate Joel Seaney, a native of Valentine, Texas, joined the Navy on April 6
, 1999. Following basic training at Recruit Training Command, Great Lakes, Illinois, he reported to Aerographer’s Mate (AG-A1) School at Keesler AFB in Biloxi, Mississippi.
Master Chief Seaney’s shore assignments include a tour at COMINEWARCOM Operations Detachment at NAS Corpus Christi, Texas (2003-2006), Instructor Duty at CNATTU Keesler AFB, Mississippi (2013-2016), and CNATTU Keesler AFB, Mississippi (2019-2021) as the Command Senior Enlisted Leader and METOC Department Head. His sea tours include USS KEARSARGE LHD-3 (1999-2003), Naval Oceanography Mine Warfare Center Sea Component (2007-2013), Naval Oceanography Survey Sea Component (2016-2019), and the Naval Oceanography Anti-Submarine Warfare Center (2021-present).
During his naval career, Master Chief Seaney has conducted global operations in support of Surface Warfare, Undersea Warfare, Anti-submarine Warfare, Mine Warfare, and Naval Special Warfare operators from the following platforms: USS KEARSAGE (LHD-3), HSV-2 SWIFT, USS DENVER (LPD-9), USS COMSTOCK (LSD-5), Bahrain-based, British Royal Fleet Auxiliary Vessels RFA LYME BAY and CARDIGAN BAY, USS ARDENT (MCM-12), USNS MAURY (T-AGS-66), USNS SUMNER (T-AGS-61), USNS BRUCE C. HEEZEN (T-AGS-64), and various other MCM platforms.
Master Chief Seaney has an Associate’s degree in Oceanography Technology, a Bachelor’s degree in Natural Sciences and Mathematics, is a Senior Enlisted Academy (SEA) “Dean’s List” awardee as a 2017 graduate from SEA (Class 206). He is designated as a METOC Master Forecaster and a specialist in Information, Aviation, and Surface Warfare. His extensive career experience includes shipboard firefighting, maintenance, and weapons qualifications, MK-18 Mod 1 & 2 Unmanned Underwater Vehicle (UUV) operator certifications, small boat coxswain operator, Navy Instructor, Master Training Specialist, and various operational weather forecasting qualifications.
Master Chief Seaney’s current tour of duty is at the Naval Oceanography Anti-Submarine Warfare Center (NOAC) in Yokosuka, Japan where he is assigned as the Command Senior Enlisted Leader.
He is married to Wendy Seaney from Corpus Christi, Texas and has three daughters.
His current awards and medals include the Navy and Marine Corps Commendation Medal (4), Navy and Marine Corps Achievement Medal (5), Good Conduct Medal (7), National Defense Service Medal, Global War on Terrorism Expeditionary Medal, Global War on Terrorism Service Medal, Armed Forces Service Medal, Kosovo Campaign Medal, NATO Medal, Outstanding Volunteer Service Medal, and various service ribbons.
Command Master Chief
Naval Oceanography Anti-Submarine Warfare Center
DoD Accessibility/Section 508
No Fear Act
Plain Writing Act
Veterans Crisis Line
DoD Safe Helpline
Commander, Naval Meteorology and Oceanography Command | 1100 Balch Blvd. | Stennis Space Center, Mississippi 39529
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