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Track NOAA 18 now!
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NOAA 18 is classified as:

NORAD ID: 28654
Int'l Code: 2005-018A
Perigee: 848.4 km
Apogee: 868.6 km
Inclination: 99.2 °
Period: 102.0 minutes
Semi major axis: 7229 km
RCS: 5.2629 m2 (large)
Launch date: May 20, 2005
Source: United States (US)
Uplink (MHz):
Downlink (MHz): 137.9125/1707.000
Beacon (MHz):
Call sign:

NOAA 18, known before launch as NOAA-N, is a weather forecasting satellite run by NOAA. NOAA-N (18) was launched into a sun-synchronous orbit at an altitude of 854 km above the Earth, with an orbital period of 102 minutes. It hosts the AMSU-A, MHS, AVHRR, Space Environment Monitor SEM/2 instrument and High Resolution Infrared Radiation Sounder (HIRS) instruments, as well as the SBUV/2 ozone-monitoring instrument. NOAA 18 is the first NOAA POES satellite to use MHS in place of AMSU-B. APT transmission frequency is 137.9125 MHz (NOAA-18 changed frequencies with NOAA-19 on June 23, 2009).
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):
1 28654U 05018A   17201.49260151 +.00000022 +00000-0 +37117-4 0  9995
2 28654 099.1809 224.5183 0013933 342.9142 017.1558 14.12342659626965
Source of the keplerian elements: Caltech