NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
CALIFORNIA INSTITUTE OF TECHNOLOGY
JET PROPULSION LABORATORY
PASADENA, CALIFORNIA 91109
MEDIA RELATIONS OFFICE
TELEPHONE (818) 354-5011
http://www.jpl.nasa.gov
RAW IMAGE POSTED - April 6, 1998 10:30 AM Pacific Daylight Savings Time
JPL MIPL CONTRAST ENHANCED IMAGE POSTED - April 6, 1998 1:45 PM Pacific Daylight Savings Time
JPL TJP CONTRAST ENHANCED IMAGE POSTED - April 6, 1998 5:30 PM Pacific Daylight Savings Time
CAPTION CORRECTION POSTED - April 7, 1998 10:30 AM Pacific Daylight Savings Time
IMAGE ORIENTATION CLARIFICATION POSTED - April 7, 1998 4:00 PM Pacific Daylight Savings Time
Enhancement of "Face on Mars" Segment by MIPL ( cydonia1c-s.gif 0.254 MB )
Enhancement of "Face on Mars" Segment by TJP ( cydonia1tp_face.gif 0.9 MB )
Map Showing Location of MGS Data to Viking Frame 035A72 ( 0.5 MB )
Complete Record of Targeted Observations
MGS Home Page
CYDONIA REGION
CYDONIA PHOTO CAPTION
Orbit: 220
Range: 444.21 km
Resolution: 4.32 m/pixel
Actual image dimensions: 1024 X 9600 pixels, 4.42 km X 41.5 km
Line time: 0.69 msecEmission angle: 44.66 degrees
Incidence angle: 64.96 degrees
Phase angle: 61.97 degrees
Scan rate: ~0.1 degree/sec
Start time: periapsis + 375 sec
Sequence submitted to JPL: Sat 04/04/98 15:15 PST
Image acquired by MOC: Sun 04/05/98 00:39:37 PST
Data retrieved from JPL: Mon 04/06/98 09:05 AM PDT
Data processed by JPL MIPL: Mon 04/06/98 12:30 PM PDT
MIPL - Mission Image Processing Laboratory, JPL
Data processed by JPL TJP: Mon 04/06/98 2:30 PM PDT
TJP - Tim J. Parker, JPL
JPL Comparison with Viking Frame 035A72: Mon 04/06/98 5:30 PM PDT
JPL Correction: Tue 04/07/98 10:00 AM PDT
CYDONIA PHOTO CAPTION as stated on: Mon 04/06/98 10:30 AM PDT
Image dimensions: 1024 X 19200 pixels, 4.42 km X 82.94 km
This was a typographical error for which we appologize.
Actual image dimensions: 1024 X 9600 pixels, 4.42 km X 41.5 km
JPL Clarification: Tue 04/07/98 4:00 PM PDT
Please note that the original RAW IMAGE file is in the orientation
as it was received from the spacecraft. All enhanced versions are
flipped from left to right to yield the correct orientation. This was
done so that the images are in the same orientation as the Viking data.
Processing Performed by Tim J. Parker, Geologist
Mars Pathfinder Science Support, JPL.
Image Processing Steps:
(1) Vertical banding in raw image removed using Vicar software with long,
narrow, highpass box filter, oriented parallel to banding in image.
(2) Performed moderate histogram stretch in Adobe Photoshop on
Macintosh desktop computer.
(3) "Flattened" broad shading variations in scene by
copying image and creating a "mask" in Photoshop with
the shading inverted with respect to the original image. This mask
was then merged with original scene and a second histogram stretch performed.
(4) Physically stretched image in Photoshop in direction perpendicular
to the narrow dimension of foreshortened craters by 151.25% in order to
approximate an orthographic view of the scene.
Processing Performed by MIPL, JPL
Image Processing Steps:
(1) The image is sized down by interpolation by a factor of two to
reduce some of the noise.
(2) A long, narrow high-pass filter is applied in a vertical orientation
to help reduce some of the instrument signature. This signature is seen
as the streaking that is noticeable in the original data.
(3) A long, narrow low-pass filter is applied in a horizontal orientation
to create an intensity average for the image.
(4) The results of these filtering operations are the stretched to
approximate a Gaussian distribution.
(5) The results of the high-pass and low-pass processing steps are
averaged together to form the final product.
(6) The image is flipped about the vertical axis to correct for the
camera orientation.
MEDIUM RESOLUTION IMAGE ( cydonia1m.gif 1.2 MB ) FULL RESOLUTION TIFF IMAGE ( cydonia1.tif 9.6 MB )
MEDIUM RESOLUTION IMAGE ( cydonia1c.gif 2.5 MB ) MEDIUM RESOLUTION TIFF IMAGE ( cydonia1c.tif 2.5 MB ) Segment of Enhanced Image ( cydonia1c-s.gif 0.254 MB ) ( cydonia1c-s.tif 0.255 MB )
MEDIUM RESOLUTION IMAGE ( cydonia1tp_top_med.gif 1.8 MB ) FULL RESOLUTION GIF IMAGE ( cydonia1tp_top.gif 7.1 MB ) FULL RESOLUTION TIFF IMAGE ( cydonia1tp_top.tif 7.9 MB ) BOTTOM PORTION
MEDIUM RESOLUTION IMAGE ( cydonia1tp_bot_med.gif 2.0 MB ) FULL RESOLUTION GIF IMAGE ( cydonia1tp_bot.gif 7.6 MB ) FULL RESOLUTION TIFF IMAGE ( cydonia1tp_bot.tif 7.9 MB )
