An official website of the United States government
Here's how you know
Official websites use .mil
website belongs to an official U.S. Department of Defense organization in the United States.
Secure .mil websites use HTTPS
means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.
Skip to main content (Press Enter).
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
Commander, Naval Meteorology and Oceanography Command (CNMOC)
Plymouth Native Serves at U.S. Navy at Naval Meteorology and Oceanography Command
by Stephanie Fox, Navy Office of Community Outreach
06 July 2022
MILLINGTON, Tenn --
A Plymouth, Minnesota, native joins Naval Meteorology and Oceanography Command as a member of the U.S. Navy.
U.S. Naval Meteorology and Oceanography Command directs and oversees more than 2,500 globally distributed military and civilian personnel who collect, process and exploit environmental information to assist Fleet and Joint Commanders in all warfare areas to make better decisions, based on assured environmental information, faster than the adversary.
Chief Petty Officer Leigh Windham joined the Navy 12 years ago. In that time, Windham has earned five Navy and Marine Corps Achievement Medals, as well as one Navy Commendation Medal.
Today, Windham serves as an aerographer's mate.
Aerographer's mates are the expert in meteorology and oceanography. They use skills in science and math to calculate weather patterns, analyze data and distribute forecasts to ships and squadrons around the world, providing accurate measures of air pressure, temperature, wind speed and sea state.
Windham and fellow aerographer’s mates are not just “weathermen”– they are integral members of the Information Warfare Community, aiding with critical knowledge in any battlespace. Serving in the Navy means they are part of a team that is taking on new importance in America’s focus on rebuilding military readiness, strengthening alliances and reforming business practices in support of the National Defense Strategy.
As a member of the U.S. Navy, Windham, as well as other sailors, know they are a part of a service tradition providing unforgettable experiences through leadership development, world affairs and humanitarian assistance. Their efforts will have a lasting effect around the globe and for generations of sailors who will follow.
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
Official U.S. Navy Website