AGS-Imager Optical Performance Summary

Band

Wavelength (microns)

 Ground Scale (km)

Pixel Width (microns) (1)

 Key Radius (microns)

RMS Spot Radius (microns) (2)

Radius of 80% Encircled Energy (3)

Merit Function

Prescription ID

Band Filter
GOES-R   1
4		 36
144		 18
72		          
AGS System   .5
1
2		 18
36
72		 9
18
36		          

VIS

0.5

 1/3

12

 6

4.2-6.4

  1.8//4.6-7.8

0.00408

(4)-VIS1-04

Sapphire

SWIR

2.0

 2/3

24

 12

4.2-6.9

 6.5//9.5-13.0

0.00879

(4)-SWL-04

Sapphire

MWIR

4.0

 4/3

48

 24

5.5-10.1

 13.0//15.0-22.5

0.00935

(4)-MWL-02

Germanium

LWIR

10.0

 4/3

48

 24

6.8-13.4

33.0//34.0 -43.0

0.00932

(4)-LWL-02

Germanium

(1) 12-microns on the Focal Plane = 1/3-km on the Earth

(2) Geometric size from ray tracing

(3) Diffraction Limited Value//System Range including diffraction.

The GOES-R inscribed circle radius requirement is 18-microns for VIS and 72-microns for the others (=1km and 4km pixels).
The "super"-R requirements are for half these values.
This system meets the R and "super"-R requirements except for the LWIR "super"-R condition.
The "super"-R requirement is for better than diffraction limited for an LWIR 30-cm diameter telescope.

(4)=C2M-105E-00D-