MESSENGER Update - March 1, 2005

http://messenger.jhuapl.edu/news_roo..._03_01_05.html

MESSENGER Status Report
March 1 ,2005

Planning for the Flip

Preparations and testing continue for the scheduled March 8 spacecraft
"flip," which will point MESSENGER's sunshade toward the Sun. The
spacecraft and mission operations teams held a final review at the
Johns
Hopkins Applied Physics Laboratory on Feb. 25 to go over plans for the
operation, which included both nominal and contingency scenarios.
Shortly after the flip, MESSENGER will deploy the boom for the
Magnetometer instrument.

Clear Signals

Using the large 70-meter antenna at NASA's Deep Space Network station
near Madrid, Spain, the team checked out MESSENGER's front fanbeam and
phased array antennas on Feb. 28. This, the first in-flight test of the
medium- and high-gain antennas on MESSENGER's sunshade side, confirmed
the systems were working normally. MESSENGER is currently using the
antennas on its back side to communicate with operators on Earth.

Mileage Milestones

On Feb. 15, after six months and 12 days in space, MESSENGER reached
the
300-million-mile mark (about 483 million kilometers) in its travels
around the Sun. Only 4.6 billion miles - roughly 7.4 billion kilometers
- to go before reaching orbit around Mercury!

Stat Corner

MESSENGER is about 89.3 million miles (143.7 million kilometers) from
the Sun and 29.8 million miles (47.9 million kilometers) from Earth. At
that distance, a signal from Earth reaches the spacecraft in 2 minutes,
40 seconds. The spacecraft is moving around the Sun at 69,266 miles
(111,473 kilometers) per hour. MESSENGER's onboard computers have
executed 27,151 commands from mission operators since launch.