DOC PREVIEW
Wide-field Infrared Survey Explorer (WISE)

This preview shows page 1-2-3-18-19-37-38-39 out of 39 pages.

Save
View full document
View full document
Premium Document
Do you want full access? Go Premium and unlock all 39 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 39 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 39 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 39 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 39 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 39 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 39 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 39 pages.
Access to all documents
Download any document
Ad free experience
Premium Document
Do you want full access? Go Premium and unlock all 39 pages.
Access to all documents
Download any document
Ad free experience

Unformatted text preview:

1 Wide-field Infrared Survey Explorer (WISE) Solar System Object Identification (SSOID) Subsystem Design Document Version 1.6 8 May 2009 Prepared by: John W. Fowler Infrared Processing and Analysis Center California Institute of Technology WSDC D-D0172 Concurred By: Roc Cutri, WISE Science Data Center Manager Tim Conrow, WISE Science Data Center System Architect John Fowler, WISE Science Data Center PRex Cognizant Engineer Dave Tholen, WISE Solar-System Object Prediction Cognizant Engineer3Revision History Date Version Author Description 9 October 2008 0.1 J. W. Fowler Preliminary Draft 15 December 2008 1.0 J.W. Fowler Initial Version 20 January 2009 1.1 J.W. Fowler Added frame coordinates for testing unmatched SSOs to determine whether they are truly “missed” 12 March 2009 1.2-1.3 J.W. Fowler Added option to skip one-way light time correction (for supporting tests using simulation), "-xL"; added array-limit specifications, "-cn", "-cx", "-rn", "-rx"; added output meta-data option, "-om" 24 March 2009 1.4 J.W. Fowler Implemented R. Walker's derived-parameter algorithms 24 March 2009 1.5 J.W. Fowler Implemented nulls in table files 8 May 2009 1.6 J.W. Fowler Updated SIS numbers; added ssothmod; expanded testing discussion4Table of Contents 1 Introduction 1.1 Subsystem Overview 1.1.1 Requirements 1.1.2 Liens 1.2 Applicable Documents 1.3 Acronyms 2 Input 2.1 SSOINIT Input 2.1.1 Control Input 2.1.2 Orbital Elements Input 2.1.3 FITS Input 2.2 SSOID Input 2.2.1 Control Input 2.2.2 FITS Input 2.2.3 WISE Source Input 2.2.4 Orbital Elements Input 2.2.5 NAMELIST Input 2.3 SSOTHMOD Input 2.3.1 Control Input 2.3.2 SSOID Input 3 Processing 3.1 SSOINIT Processing 3.2 SSOID Processing 3.2.1 SSO Input 3.2.2 SSO Position Computation and WISE Association 3.2.3 Thermal Model Processing 3.3 SSOTHMOD Processing 4 Output 4.1 SSOINIT Output 4.1.1 Orbital Element Subset Output 4.1.2 Three-Epoch Ephemerides File 4.2 SSOID Output 4.2.1 SSO/WISE Associations Output File 4.2.2 SSO Meta-Data Output File 4.3 SSOTHMOD Output 4.3.1 SSO/WISE Associations Output File 5 Testing Appendix A SSO Orbit and Apparent Position Computation Appendix B Mapping Position Error Covariance Matrices51 Introduction 1.1 Subsystem Overview This document presents the requirements, design, algorithms, and state of implementation of the SSOID (Solar System Object Identification) subsystem of the WSDC data processing system. Two SSOID modules run in the scan pipeline with different processing scopes: SSOINIT processes a half-orbit scan to produce a subset of the SSO data base appropriate for the sky covered in that scan, and SSOID runs on individual framesets. The third module, SSOTHMOD, runs offline as needed to update thermal-model results. 1.1.1 Requirements The SSOID subsystem is required to predict the positions of known solar system objects in WISE framesets and to associate these predictions with WISE point sources. The Level 4 requirements supported by this processing are as follows. L4WSDC-027: The WSDC shall identify and compile a listing of known solar system objects that are positionally associated with source extractions in the WISE single -epoch image frames. L4WSDC-028: The solar system objects associated with WISE single-epoch extractions shall include asteroids, comets, planets, and planetary satellites. 1.1.2 Liens • Processing of planetary satellites has not yet been implemented. • Processing of WMOPS files by ssothmod has not yet been implemented.61.2 Applicable Documents This subsystem conforms to the specifications in the following project documents: • WISE Science Data Center Functional Requirements Document, WSDC D-R001 • WISE Science Data System Functional Design, WSDC D-D001 • Software Management Plan, WSDC D-M003 • SIS sso01: SSO Orbital Elements File, WSDC D-I145 • SIS sso02: SSO ssoinit/ssoid Intermediate File, WSDC D-I146 • SIS sso03: SSO Three-Epoch Ephemerides File, WSDC D-I147 • SIS sso04: SSO/WISE Associations File, WSDC D-I148 • SIS sso05: SSO Meta-Data File, WSDC D-I149 • SIS pht01: WPHot Output Photometry Table, WSDC D-I107 • Harris, A.W. 1998. A thermal model for near-Earth asteroids. Icarus 131, 291-301 1.3 Acronyms 2MASS Two-Micron All-Sky Survey FRD Functional Requirements Document SDS Subsystem Design Specification SIS Software Interface Specification SSO Solar System Object SSOID Solar System Object Identification (subsystem and processor) SSOINIT Solar System Object Initialization processor SSOTHMOD Solar System Object Thermal Model processor W1 WISE wavelength channel 1, 3.3 microns W2 WISE wavelength channel 2, 4.7 microns W3 WISE wavelength channel 3, 12 microns W4 WISE wavelength channel 4, 23 microns WISE Wide-field Infrared Survey Explorer WSDC WISE Science Data Center WSDS WISE Science Data System72 Input 2.1 SSOINIT Input 2.1.1 Control Input The ssoinit module reads control input in the form of command-line parameters which are shown in its tutorial display: ssoinit: Solar-System Object Initialization Utility vsn 1.2 A90401 usage: ssoinit <flags> <specifications> where <flags> <specifications> must be: -i InputFNam (Input orbital elements file name) -o OutputFNam (Output orbital elements subset file name) -f1 FITSnam1 (Name of first-frame FITS file) -f2 FITSnam2 (Name of ~mid-frame FITS file) -f3 FITSnam3 (Name of last-frame FITS file) -w Window (Half width of angle window perpendicular to the scan axis, deg; default = 2) -i2 SSOlist (Name of file containing a list of names of SSOs to be output independently of whether they are in the scan swath) -o2 SSOephem (Name of output ephemeris file for SSOs specified via "-i2") The first five specifications above are required. The input orbital elements file contains the orbital elements in the format used by the 2MASS DTPGM program. The output orbital elements subset file contains these same elements for the subset of SSOs that fall within the scan swath defined by the epochs of the first and third FITS files (swath endpoints) and the Window


Wide-field Infrared Survey Explorer (WISE)

Download Wide-field Infrared Survey Explorer (WISE)
Our administrator received your request to download this document. We will send you the file to your email shortly.
Loading Unlocking...
Login

Join to view Wide-field Infrared Survey Explorer (WISE) and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Wide-field Infrared Survey Explorer (WISE) 2 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?