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+.help datascope Aug06 nvo
+.ih
+NAME
+datascope -- Toy "DataScope" application
+.ih
+USAGE
+datascope what
+.ih
+PARAMETERS
+.ls what
+An image name, or the name of an object to be resolved into coordinates.
+In the case of an image, the image is opened and if a valid WCS is 
+found the footprint of the image is used as the basis for the search.
+In the case of an object name, the coordinates are resolved using the
+\fBSESAME\fR service and a search of size \fBsr\fR degrees is performed.
+The task will abort if the image doesn't contain a valid WCS.
+.le
+.ls service = "cone"
+Type of service to query. \fBCone\fR or \fBsiap\fR are the only supported
+services at the moment, "catalog" and "image" may be used as aliases 
+respectively.  To query all supported services the value "all" may be used.
+.le
+.ls bandpass = "optical"
+The bandpass of the service to be used (e.g. 'infrared', 'optical',
+'x-ray', etc).  Only those Registry resources listing this as part 
+of the spectral coverage field will be queried.
+.le
+.ls sr = ""
+Search radius in decimal degrees.  This parameter is only used when 
+resolving an object name.
+.le
+.ls filter = yes
+Filter zero-valued or Error-returns
+.le
+.ls verbose = yes
+Verbose output flag.
+.le
+.ls status = ""
+Status return code of task (output).
+.le
+
+.ih
+DESCRIPTION
+
+The \fBDATASCOPE\fR task ......
+
+.ih
+EXAMPLES
+1.   Find IR catalogs that have data covered by the footprint
+of the dev$wpix test image, filter results to exclude non-detections:
+
+.nf
+  cl> datascope dev$wpix service=cone bandpass=infrared filter+
+  #
+  #  Search Terms:  RA=13:27:47.0  Dec=47:27:13.7  SR=0.109
+  #  Service Type:  cone
+  #  Total Querys:  22
+  #
+  #
+  #Num  ShortName       Count   IVO Identifier
+  #---  ---------      -----   --------------
+     1   2MASS-PSC(CDS)   63   http://vizier.u-strasbg.fr/2MASS
+     2   Simbad           10   ivo://CDS/simbad
+     3   ADIL              1   ivo://adil.ncsa/targeted/conesearch
+     4   NED(sources)      9   ivo://ned.ipac/Basic_Data_Near_Position
+
+.fi
+
+2.  Find X-Ray image observations of M54:
+
+.nf
+  cl> datascope M54 service=siap bandpass=x-ray filter+
+  #
+  #  Search Terms:  RA=18:55:03.3  Dec=-30:28:42.6  SR=0.250
+  #  Service Type:  siap
+  #  Total Querys:  14
+  #
+  #
+  #Num  ShortName      Count   IVO Identifier
+  #---  ---------      -----   --------------
+     1   Chandra           2   http://cxc.harvard.edu/cda
+     2   NED(images)       2   ivo://ned.ipac/Image
+     3   RASS              3   ivo://nasa.heasarc/skyview/rass
+  #
+  #  Zero Values: XMM-Newton,PSPC2,Granat/Sigma,HEAO1A,HRI,INTEGRALSPI_gc,
+  #               PSPC1,RXTE,
+  #  Err Returns: ROSAT/PSPC,SkyView,RASS3,
+
+
+  Now examine the Chandra images, since we match bandpass based on
+  the CoverageSpectral field of the resource we're not guaranteed that
+  the images being reported multiwavelength services are actually X-Ray.
+
+  cl> sesame M54
+  cl> siap regResolver ("Chandra","siap") sesame.ra sesame.dec 0.25 0.25
+	... to print the SIAP return table, 
+
+  To download the images directly....
+
+  cl> int siap, count, stat
+  cl> sesame M54
+  cl> siap = dalSiapSvc(regResolver("Chandra","siap"),ses.ra,ses.dec,0.25)
+  cl> count = dalRecordCount(siap)
+  cl> for (i=0; i < count; i=i+1) {
+  >>>     stat = dalGetData (siap, i, "chandra"//i//".fits")
+  >>> }
+.fi
+
+.ih
+REVISIONS
+.le
+.ih
+SEE ALSO
+voclient
+.endhelp