GRACE-FO 1

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10-day predictions
GRACE-FO 1 is classified as:

Space & Earth Science

NORAD ID: 43476

Int'l Code: 2018-047A

Perigee: 487.3 km

Apogee: 514.8 km

Inclination: 89.0 °

Period: 94.5 minutes

Semi major axis: 6872 km

RCS: Unknown

Launch date: May 22, 2018
Source: United States (US)
Launch site: AIR FORCE WESTERN TEST RANGE (AFWTR)

GRACE-FO 1 and GRACE-FO 2 are two identical Earth science satellites with primary research objective focused on gravity measurements and Earth's water cycle. Built by Airbus Defense and Space, the identical GRACE-Follow On satellites carry microwave ranging instruments to measure the separation between the craft as they fly around 137 miles (220 kilometers) apart in orbit. The ranging sensors require exacting precision, with the capability of measuring distance changes between the formation-flying satellites as small as a few microns—about the width of a blood cell. Changes in the range between the two GRACE-Follow On satellite will be caused by tiny variations in the pull of gravity from Earth below, telling scientists about the mass of water, rock and ice around the world.

1 43476U 18047A   20018.60875476 +.00000256 +00000-0 +92244-5 0  9997
2 43476 088.9975 158.1064 0020002 117.4719 242.8565 15.23963772092245

Source of the keplerian elements: AFSPC