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)
U.S. National Ice Center Welcomes New Director
by LT Falon Essary
12 July 2021
SUITLAND, MD --
SUITLAND, MD — The U.S. National Ice Center (USNIC) comprises elements of the U.S. Navy, the National Oceanic and Atmospheric Administration (NOAA) and the United States Coast Guard (USCG). The Naval Ice Center (NAVICECEN), a military unit under Commander, Navy Meteorology and Oceanography Command, is the largest component of the U.S. National Ice Center and the Center’s only independent command. The Commanding Officer of NAVICECEN also serves simultaneously as the Director of USNIC, Jul. 12, 2021.
CDR Casey J. Gon relieved CDR Heather H. Quilenderino as Commanding Officer of NAVICEN during a change of command ceremony held at the NOAA Satellite Operations Facility (NSOF) in Suitland, MD on 08 July 2021 at 1000.
During the ceremony, CDR Quilenderino stated, “USNIC, 32 months ago, I charged you with three things: Take pride; challenge everything; be excellent. You have exceeded the charge every step of the way.” Praising the crew throughout her speech CDR Quilenderino mentioned, “Seeing how we have evolved as a team over the past two and a half years, how your expertise is in greater demand than ever before, and how you rise to meet the challenges we’ve encountered, there is no doubt that we strive for excellence every single day.” CDR Quilenderino emphasised how excited she is for the new Commanding Officer CDR Gon stating, “Team USNIC is an incredible group of caring, dedicated professionals executing an exciting mission, protecting safety of life and navigation in the world’s harshest environments.”
CDR Quilinderino has served as the Director of USNIC since November 2018, overseeing 50 military and civilian personnel who provide global to tactical scale ice and snow products, ice forecasting, and related environmental intelligence for the United States government.
The Presiding Officer of the ceremony was CAPT Erin Acosta, Commander, Fleet Weather Center, Norfolk.
During her speech she mentioned, “We are here today to celebrate the U.S. National Ice Center’s collective accomplishments, technical expertise, talented workforce, dedication and preeminence in such a crucial and important mission.” With regard to CDR Quilinderino, CAPT Acosta said that “She masterfully led this diverse team through a period of unprecedented increase of interest, operations and strategic engagement in the Arctic...she led this team daily with a laser focus on the future...she did this with passion and zeal, with character, with creative and innovative thinking.”
CDR Quilinderino is scheduled to report for duty as VADM Jeffrey Trussler Deputy Chief of Navy Operations for Information Warfare’s, Deputy Executive Assistant.
After assuming command, CDR Gon spoke to the crew stating, “We at the U.S. National Ice Center have the incredible challenge of characterizing the most complex and harsh domain that ships, submarines and aircraft operate in, the Arctic and Antarctic….I look forward to leading the USNIC Family through all steps of this complex problem set and I cannot wait to get started.”
CDR Gon most recently served in the Fifth Fleet as the Fleet Oceanographer and Maritime Operations Center Executive Officer.
Change of Command
US National Ice 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
Official U.S. Navy Website