# Pointing INTEGRAL v0.1
#
# this ssc can be used to view an object as INTEGRAL would see it.

# The "integral-fov" marker is out in front of the telescope at a distance and size which
# make it very close to the correct angular size on the sky
# when viewed from the viewpoint "integral-pov"
# the "fov" marker displays the fields of view of the various detectors in the telescope.


# To view the remote object as INTEGRAL would, 
# GoTo  "integral-pov", 
# Track "integral-fov"
# and modify the magnification appropriately.

# The detectors' fov outlines were taken from Figure 2 of the PDF document
# "Announcement of Opportunity"
# available at http://integral.esac.esa.int/AO4/AO4_Policies.pdf
# and from information provided by Nicolas Produit on the Celestia Web forum.


# the following objects track INTEGRAL's orientation and location


"integral-fov" "Sol/Earth/INTEGRAL" {
	Mesh "fov.cmod"
	Radius 57.735

	Class "spacecraft"
	FixedPosition	[0 0 100]
	OrbitFrame { BodyFixed { Center "Sol/Earth/INTEGRAL" } }
	Albedo 1e-32
}


"integral-pov" "Sol/Earth/INTEGRAL" {
	Class "spacecraft"
	Mesh "invisible.cmod"
	Radius 0.0001
	Color [ 0 0 0 ]

	FixedPosition	[0 0 0.001]
	OrbitFrame { BodyFixed { Center "Sol/Earth/INTEGRAL" } }
	Albedo 1e-32
}


Modify "integral-fov" "Sol/Earth/INTEGRAL" {


    FixedRotation
    {
       MeridianAngle   0.0
    }


	BodyFrame {
	    TwoVector {
	        Center "Sol/Earth/INTEGRAL/integral-fov"
	        Primary {
			Axis "z"
			ConstantVector {
				Vector [0 0 1] 
                	        Frame {  BodyFixed { Center "Sol/Earth/INTEGRAL" } }
			}
	        }
 	   	Secondary {
			Axis "y"
			ConstantVector { 
				Vector [0 1 0] 
                	        Frame {  BodyFixed { Center "Sol/Earth/INTEGRAL" } }
			}
		}
	    }
	}
}

Modify "integral-pov" "Sol/Earth/INTEGRAL" {


    FixedRotation
    {
       MeridianAngle   0.0
    }


	BodyFrame {
	    TwoVector {
	        Center "Sol/Earth/INTEGRAL/integral-pov"
	        Primary {
			Axis "z"
			ConstantVector {
				Vector [0 0 1] 
                	        Frame {  BodyFixed { Center "Sol/Earth/INTEGRAL" } }
			}
	        }
 	   	Secondary {
			Axis "y"
			ConstantVector { 
				Vector [0 1 0] 
                	        Frame {  BodyFixed { Center "Sol/Earth/INTEGRAL" } }
			}
		}
	    }
	}
}