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HESSI satellite launch date set

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  • b1blancer_29501
    KSC Release No.: 05 - 02 NOTE TO EDITORS/NEWS DIRECTORS: HESSI SPACECRAFT TO BE LAUNCHED FEB. 5 The launch of NASA s High Energy Solar
    Message 1 of 702 , Feb 1, 2002
      KSC Release No.: 05 - 02<br><br>NOTE TO
      FEB. 5<br><br>The launch of NASA's High Energy Solar
      Spectroscopic Imager (HESSI) spacecraft aboard an Orbital
      Sciences Corporation air-launched Pegasus vehicle is
      currently scheduled for deployment from the company's
      L-1011 carrier aircraft on Tuesday, Feb. 5 at 3:26 p.m.
      EST. This time is contained within a launch window
      that opens at 3:21 p.m. and closes at 5:21 p.m.
      EST.<br><br>The launch begins with the drop of the Pegasus from
      the L-1011 over the Atlantic Ocean at an altitude of
      39,000 feet at a location approximately 100 miles
      offshore east-southeast from Cape Canaveral Air Force
      Station, Fla. The launch is expected to be visible from
      the coast. Spacecraft separation from the Pegasus
      occurs approximately 9 1/2 minutes later. At that time
      HESSI will be in 373 mile-high (600 kilometer)
      orbit.<br><br>HESSI will study solar fares, the solar system's
      mightiest explosions in the atmosphere of the Sun. It will
      use a unique kind of X-ray vision that will reveal
      for the first time how flares can pack a punch up to
      the equivalent of a billion megatons of
      TNT.<br><br>HESSI's unprecedented ability to make images of solar
      flares in X-rays and gamma rays will enable scientists
      for the first time to track accelerated flare
      particles, exploring the sudden energy release in a way
      never before possible.<br><br>HESSI will finally unlock
      the secrets of a solar flare's initiation and onset
      by producing unprecedented high-fidelity movies in
      their highest energy emission. This kind of data is
      vital to scientists because it will improve their
      predictability of flare occurrence on the Sun and the subsequent
      consequences we experience here on Earth. Using the Sun as a
      "laboratory," where such high-energy events take place, will
      provide researchers insight into interpreting similar
      high-energy activity that originate elsewhere in the
    • b1blancer_29501
      On Feb 28th, the Interplanetary Magnetic Field swung to a strong south-pointing orientation. That, coupled with an elevated solar wind speed and density,
      Message 702 of 702 , Mar 1, 2002
        On Feb 28th, the Interplanetary Magnetic Field
        swung to a strong south-pointing orientation. That,
        coupled with an elevated solar wind speed and density,
        triggered a G-1 class geomagnetic storm. The result was
        some high latitude aurora. See this link for a
        photgraph of aurora observed over Quebec :
        <a href=http://www.spaceweather.com/aurora/images/01mar02/Moussette2.jpg target=new>http://www.spaceweather.com/aurora/images/01mar02/Moussette2.jpg</a> . As of right now, there are 3 sunspot regions,
        namely 9839, 9842, and 9845, that appear to be capable
        of producing M-class flares. Regions 9839 and 9842
        are close to rotating out of view over the western
        limb of the solar disk. Sunspot region 9845, however,
        is close to the sun's central meridian. A rather
        large coronal hole is also approaching the sun's
        central meridian, and coming into an Earth-pointing
        position. High speed colar wind gusts are likely around the
        first of next week.<br><br>The current solar and
        geomagnetic conditions are :<br><br>NOAA sunspot number :
        153<br>SFI : 188<br>A index : 10<br>K index : 1<br><br>Solar
        wind speed : 372.3 km/sec<br>Solar wind density : 4.4
        protons/cc<br>Solar wind pressure : 1.1 nPa<br><br>IMF : 8.4
        nT<br>IMF Orientation : 0.7 nT North<br><br>Conditions for
        the last 24 hours : <br>Solar activity was low. The
        geomagnetic field was quiet to unsettled. Stratwarm Alert
        exists Friday.<br><br>Forecast for the next 24 hours
        :<br>Solar activity will be low to moderate. The geomagnetic
        field will be quiet to unsettled.<br><br>Solar Activity
        Forecast :<br>Solar activity is expected to be low to
        moderate for the next three days. Region 9845 is a
        possible source for isolated M-class
        flares.<br><br>Geomagnetic activity forecast :<br>Geomagnetic field activity
        is expected to be mainly quiet to unsettled, until
        the onset of high speed stream effects from a
        recurrent coronal hole begin to develop by day three of the
        forecast period. Isolated active conditions are
        anticipated thereafter.<br><br>Recent significant solar flare
        activity :<br>None
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