Ida Image Control Network
- Originators
- USGS Astrogeology Science Center
- Publisher
- USGS Astrogeology Science Center
- Abstract
-
This page has been created as part of a project to put planetary control networks on the web. This control network for asteroid 243 Ida originated from Merton Davies and Tim Colvin at the RAND Corporation and was provided to the USGS in 1995. The control network solution was originally performed with software developed at RAND, and documented by Colvin (1992). Each control network is essentially a set of photogrammetric solution (input and output) files. The input files consist of, aside from a priori information, measurements of common points (control points, sometimes called tie points) on images of a planetary body. The output files include the body coordinates of the control points in latitude, longitude, and radius, and revised orientation information (camera pointing) for the images. The primary use of such information is for the creation of image mosaics of the planetary body. However, these solutions can also provide fundamental data on the size and shape of the body, its rotation period, and the direction of its polar axis in space. The control point coordinates also usually serve as a coordinate reference frame that defines the fundamental coordinate reference system for the body in question. This network consists of 255 control points and incorporates 10 images from the Galileo SSI instrument (Davies et al., 1994). This release is comprised of data from original RAND control network solutions raw Galileo SSI images and file-format description files.
- Purpose
- Created as part of a project to put planetary geodesy control networks on the web. The 243 Ida Galileo control network data here was originally provided by Merton Davies and Tim Colvin of the RAND Corporation. Funds were provided for a conversion and archiving effort by the NASA Planetary Geology and Geophysics Program and the NASA Cartography Program.
Contact and Distribution
- Format
- Control Network
- Access Scope
- Native Data Set Environment
- Astrogeology Theme
- Control Network
- Mission Names
- Galileo
- Instrument Names
- SSI
- Online Package Link
- https://astrogeology.usgs.gov/search/map/ida_image_control_network
- External File Size
- 838075
- Online File Link
- http://astropedia.astrogeology.usgs.gov/download/Ida/ControlNetworks/Ida_data.zip
- Access Instructions
-
Contained in the ZIP file are the necessary data to open the RAND solution of the Ida control network in its original RAND solution format.
The ZIP file contains all necessary data to re-create the control network including the raw Galileo images.
Ida_data.zip Contents:
Ida_control_images.zip â All Galileo Ida control-network images in PDS3-format (.img files with detached .lbl labels).
Control Network in RAND format:
zche.dat â RAND solution residual output file.
zinp.dat â RAND solution âpoles, points, and positionsâ a priori input file.
zmea.dat â RAND solution image measurements (mm) input file.
zout.dat â RAND solution âpoles, points, and positionsâ output file.
zpar.dat â RAND solution program operation control input file.
Documentation and Information:
Dione_image_list.txt â Text file listing all Galileo images in the Ida control network. These images are
archived at pds.nasa.gov in PDS format (.img + .lbl).
ISIS-PG-FMT501_zpar_dat â Description of format of file zpar.dat (in PDF format).
ISIS-PG-FMT502_zout_dat â Description of format of file zout.dat (in PDF format).
ISIS-PG-FMT502_zinp_dat â Description of format of file zinp.dat (in PDF format).
ISIS-PG-FMT503_zmea_dat â Description of format of file zmea.dat (in PDF format).
ISIS-PG-FMT511_zche_dat â Description of format of file zche.dat (in PDF format).
- Contact Address
- 2255 N. Gemini Drive
- Contact City
- Flagstaff
- Contact State
- AZ
- Contact Postal Code
- 86001
- Contact Email
- astroweb@usgs.gov
Geospatial Information
- Target
- Ida
- System
- Small Bodies
- Object Type
- Grid Cell
- Quad Name
- Horizontal Coordinate System Units
- Degrees
