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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
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/EXW) Edward A. Vargas
Senior Enlisted Leader, Naval Oceanography Mine Warfare Center
15 June 2022
Master Chief Vargas hails from Crane, Texas and is a 1997 graduate of Crane High School. He enlisted in the U.S. Navy in January of 1998 and reported for training at Great Lakes, IL where he completed Recruit and Seaman Apprenticeship training. He then reported to the USS Nimitz (CVN-69) where he was assigned to the deck dept and later approved for cross rate to Aerographer’s Mate (AG). In Jan 2000, he reported to “AG-A1” school at Keesler AFB in Biloxi, MS.
Upon graduation, he served at the Naval Pacific Meteorology and Oceanography Detachment in Lemoore, CA until June 2003. Following his tour, he attended “AG-C1” school at Keesler AFB and was later assigned to the Mobile Environmental Team San Diego, CA in 2004. During his time onboard he was selected to support Naval Special Warfare Group One in Coronado, Ca. where he provided enviromental support to the NSW Mission Support Center and did multiple deployments with Seal Team Seven. He then promoted to Petty Officer First Class and became a Plankowner of the Naval Oceanography Special Warfare Center (NOSWC) San Diego.
In 2008, he reported to the Naval Oceanography Special Warfare Detachment Norfolk, VA where he was selected to Chief Petty Officer. He then served as LCPO for Naval Oceanography Anti-Submarine Warfare Detachment Kanehoe Bay in 2011 and NOSWC San Diego in 2014.
In 2017, he was assigned to the Maritime Operation Center under Commander, Naval Meteorology and Oceanography Command (CNMOC) and was later selected for Senior Chief
Petty Officer in 2018. In February 2020, he arrived at Naval Oceanography Mine Warfare Center (NOMWC) in Stennis Space Center, MS to begin his first tour as a Senior Enlisted Leader.
Senior Chief Vargas is a graduated of the Senior Enlisted Academy (Class 207) and the Command Master Chief/Chief of the Boat Course (Class 20110)
He is authorized to wear the Navy and Marine Corps Commendation Medal (six awards), the Navy and Marine Corps Achievement Medal (two awards), the Army Commendation Medal, the Army Achievement Medal and numerous campaign ribbons.
Naval Oceanography Mine Warfare Center
Senior Enlisted Leader
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Commander, Naval Meteorology and Oceanography Command | 1100 Balch Blvd. | Stennis Space Center, Mississippi 39529
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