You have met Chad Brown a member of our team from Polar Grid.

    Chad Brown of Polar Grid
    Data backup man!!!

    {photo of Chad 1 of 6]

    He along with Keith Lehigh represent Polar Grid and brought to the
    field the computer processors which enable the team to get a first look
    at the data to ensure that all the equipment is in perfect working
    order. Keith was here the first part of the expedition and left last
    week. Not one for smiling in front of a camera I did get a grin from
    him just before he boarded the plan out of Byrd Surface Camp.

    Keith Lehigh
    Last day for Keith at Byrd Surface Camp

    Logan Smith, a member of the team from KU, does some of the early
    processing.

    Logan Smith
    Graduate research assistant for CReSIS

    Here is a picture of the data you helped collect on our flight yesterday.

    CReSIS Flight Data
    Graph #2

    CReSIS Flight Data
    Graph #1

    Study the graphs of the data. The x-axis has the points of latitude and
    longitude which also correspond to the same points on your flight plan.

    Flight Plan
    A CReSIS flight plan used by the pilots

    The y-axis on the data graph shows the depth in meters as recorded by
    the radar.

    On the y-axis you will see that zero is not on the bottom of the axis
    like most of the graphs you might work with in school. Zero is up near
    the top and it represents the point inside the plane from where the
    radar sends its signal. You will also see a color change at about 250
    meters. This is surface of the ice sheet.

    The Challenge:

    1. Look at your flight plan and the data picture. Mark on you flight
      plan where this data set was taken during the flight. (Hint: Use the
      points of latitude and longitude.)You will discover that this is not the
      data from the whole flight.

    2. Why are there gaps in the orange data at regular intervals? (Hint:
      What is the plane doing at those points of latitude and longitude?)
      You have now been looking at this data set. Notice the distinct line at
      around 3000 meters. That is the ground under the ice sheet. You will
      also see on the x-axis how many kilometers this data set represents.

    3. Now that you have marked your flight plan to represent the data set
      you have studied. Approximately how many kilometers did we fly for the
      whole day's mission?

    4. Can you think of ways this data could be used?

    5. What could be studied if we could know what the topography is beneath
      the ice sheet?

    Answers:

    1. The data chart represents the red lines on the flight plan (plus a
      little more).

    2. The gaps in the orange colored layers represent the times the plane
      leaves the grid and turns. As it turns it banks to the left or right
      and the wings are not parallel to the ground and the radar is not
      focused down into the ice.

    3. The flight plan represents 500-600 nautical miles.

    4&5 I will let you be the scientists and post your ideas to "Ask the Team"

    Great Job, Trekkers
    Mr. W

    ***Note from PolarTREC Team:  Join us for the last live event with Gary and the Team on Thursday, 7 January 2010.  For more information about the times and to register,  please check out the Live from IPY pages or click here. ***

    Comments