Below is a list of interesting objects identified semi-automatically
in 34 digital images downloaded from ftp://bg-login2.sdsc.edu/ER2 on
2007 Feb 03 at 03:47 UTC. The original image names were 594382??.tif.

According to the summary of flight 07-614, the images were obtained
on a 2007 Feb 02 flight of an ER-2c out of Ames. The three spectral
bands cover 0.51-0.99 microns. Each image is 4072 x 4072 pixels.
With a 80 mm focal length, the nominal resolution is 2.2 meters.

We divided each image into 144 tiles, each with 339 x 339 pixels. We
summed the three channels and subtracted the median of all pixels in
the tile. We then searched for small groups of pixels with at least
5 pixels above 70 counts. We ignored tiles with many such groups,
which tended to be cloudy. We visually inspected the remaining pixel
groups, keeping 37 potentially interesting objects.

We undoubtedly missed some potentially interesting objects, and some
of the objects we list may turn out to be artifacts. Nonetheless,
this catalog of interesting object will hopefully provide a useful
starting point for correlating objects imaged at different times.

We used longitude and latitude information in b05943_database.txt to
convert the X and Y coordinates of interesting objects to longitude
and latitude. We used a land segment in the first image (59438221.tif)
and a diagram of the flight path to figure out the inobvious mapping
between our image X and Y coordinates and "left", "right", "fore",
and "aft" during the flight. After reading the images into IDL using
read_tiff, we inferred the following mapping:

  image[4071,4071] is the foreward-left corner
  image[   0,4071] is the foreward-right corner
  image[   0,   0] is the aft-right corner
  image[4071,   0] is the aft-left corner

THE COORDINATE SYSTEM MAY BE DIFFERENT IN OTHER IMAGE PROCESSING
SOFTWARE, but we should eventually be able to agree on longitude and
latitude. Our longitude and latitude transformations should be treated
as preliminary until they are checked independently.

For each interesting object, we created two-panel JPEG images with a
21x21 pixel zoom and 161 x 161 pixel overview of each object. The
data values in these images are scaled to improve visual contrast.
A title above the panels gives the original filename, date, time,
longitude, latitude, X, and Y. These same data are tabulated below:

Interesting_Object   ,Filename    , Longitude,Latitude,   X,   Y, Pk, N
59438221_121552_35980,59438221.tif,-121.55193,35.98013,2114,3125, 97, 6
59438221_121543_35974,59438221.tif,-121.54253,35.97372,2435,2568, 97, 9
59438222_121580_35985,59438222.tif,-121.58027,35.98466,1606,1497,193, 8
59438222_121598_35986,59438222.tif,-121.59757,35.98633,1658,2406, 93, 9
59438222_121609_35991,59438222.tif,-121.60868,35.99104,1459,3031, 97, 7
59438222_121579_35978,59438222.tif,-121.57927,35.97790,2026,1368, 93, 8
59438222_121598_35967,59438222.tif,-121.59797,35.96679,2907,2203,100,11
59438223_121635_36008,59438223.tif,-121.63472,36.00813, 168,1456,104, 6
59438223_121634_35997,59438223.tif,-121.63447,35.99733, 850,1315,104,17
59438223_121649_35992,59438223.tif,-121.64920,35.99206,1321,2007, 92, 9
59438224_121726_36010,59438224.tif,-121.72599,36.00951, 702,3049, 98, 5
59438224_121691_35973,59438224.tif,-121.69063,35.97306,2705, 825,258, 8
59438224_121732_35972,59438224.tif,-121.73154,35.97177,3167,2917,286,16
59438225_121758_35975,59438225.tif,-121.75777,35.97480,2662,1148, 83, 5
59438228_121983_35996,59438228.tif,-121.98293,35.99643,2479,3550,130, 6
59438231_122126_36026,59438231.tif,-122.12614,36.02572, 404,2065,100, 6
59438231_122164_36012,59438231.tif,-122.16366,36.01182,1618,3842,141, 5
59438231_122170_35985,59438231.tif,-122.17043,35.98479,3414,3898, 87, 6
59438232_122277_36099,59438232.tif,-122.27700,36.09923,2164,3307,107,12
59438233_122291_36101,59438233.tif,-122.29095,36.10100,2812, 833,108, 9
59438233_122315_36120,59438233.tif,-122.31516,36.12003,3378,2505,161, 9
59438233_122323_36142,59438233.tif,-122.32338,36.14199,3115,3962, 82, 5
59438233_122321_36124,59438233.tif,-122.32119,36.12360,3555,2854,139, 5
59438233_122305_36088,59438233.tif,-122.30494,36.08787,3840, 413, 90, 7
59438233_122321_36110,59438233.tif,-122.32055,36.10964,3933,2037,111, 7
59438234_122290_36187,59438234.tif,-122.28969,36.18710, 276,2802,114, 6
59438234_122284_36175,59438234.tif,-122.28447,36.17522, 394,1998, 99, 8
59438234_122299_36173,59438234.tif,-122.29875,36.17343,1107,2236,167, 7
59438235_122312_36200,59438235.tif,-122.31157,36.19995,1006,1071,148,10
59438235_122326_36227,59438235.tif,-122.32643,36.22670, 879,2958,108, 6
59438235_122332_36230,59438235.tif,-122.33248,36.23028,1050,3309,119,13
59438235_122335_36229,59438235.tif,-122.33532,36.22934,1211,3324,194, 6
59438236_122351_36267,59438236.tif,-122.35055,36.26682, 836,2944,119, 3
59438239_122445_36375,59438239.tif,-122.44474,36.37485,2144,2430,125,10
59438246_123421_37926,59438246.tif,-123.42105,37.92595,2504,3999,271, 7
59438250_123264_37736,59438250.tif,-123.26351,37.73609, 220,1762,169,10
59438250_123241_37742,59438250.tif,-123.24090,37.74193,1420,1905,152, 5

For each interesting object, we adopt the following naming convention:

  image root name _ round(abs(1000*longitude)) _ round(1000*latitude)

Send corrections and questions to Maria Nieto Santisteban (nieto@
pha.jhu.edu) or Jeff Valenti (valenti@
stsci.edu).