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Leonid MAC

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Support data to help determine layout of instruments on NASA DC-8 Airborne Laboratory.



There are several types of equipment racks. The preliminary position of racks are shown in this floorplan. Please choose between the following types and let us know what type is needed:

DC8 basic setup DC8 low rack DC8 60 degree window

Left: Basic design for window-supported instrument mount. Leonid MAC cameras will be pointed upward. The support has to withstand a 9 g load. Middle:Low 19" instrument support rack. Right:High instrument rack. Also shown are the two 60 degree windows. Below: Stow box for equipment storage during takeoff and landing.

DC8 stow box

DC-8 optical port DC-8 zenith dome ASUR window

10 flat 13x15 inch window ports are available on the DC8 , as well as one zenith port with a dome. The following windows are available: 3 Borosillicate/BK7, 4 Pyrex, 2 Fused Quartz, 5 Soda-Lime or "Float Glas". Only three window assemblies are complete, others are in casings but need yet to be installed in window blanks. The windows have window rails that can be used to mount the instruments.

The following mid-IR windows are available: Sapphire (0.15 - 5.5 microns) is available as 4.5" diameter circular port; Germanium (1.8 - 23 microns - Best 8-14 microns) is available as 5.5" circular port, with second adjacent "clear glass" (of unknown type) approx 5.5X11". ASUR will have its own window, same installation configuration as in prior missions (assumed right side).

Instrument layout:

Allsky camera P. Jenniskens
   [ZENITH] Zenith InGaAs needs one near-IR transparent (6" dia dome), 
             Plastic type material.
Right side of plane: 
Airglow and narrow-band imagers   M. Taylor
   [R570] - Co-aligned optical cameras
  need one optically flat window (400-900 nm) (Pyrex)
   [R530] - InGaAs camera needs one near-IR transparent window (Pyrex)
       fixed mounted at 30 degree elevation (co-aligned with ASUR)
ASUR spectrometer                  K. Kuenzi
   [R620]  - Needs custom polyethyene viewport
       fixed mounted at 30 degree elevation
UEA telescope                      J. Plane
   [R1010] - Telescope needs one optically flat window BK7 (350-900 nm),
spectrograph mounted on floor, computer in rack. 
VNR                                E. Schilling
   [no window] - Editing studio in back of plane 
(shown is the ARIA version, can be adapted to available facilities).
     HDTV camera, share window 400-900 nm  
flux counter                       C. Crawford
   [R1290] - Two stand alone cameras need one optically flat window on 
right side of plane (400-900 nm)
   [share R1290] - ESA-IC with 
         control unit/laptop
Left side of plane: 
High-speed photometer  H. Nielsen
  [L330] One optically flat window. 
High-frame rate imaging H. Nielsen
   [L450] Needs one optically flat window (500-900 nm). Camera 
has its own mount.
Near-IR spectroscopy            R. Blanco
   [L570] Needs optical window 900-1000 nm. 
Optical imaging            R. Blanco
   [L901] Needs optical window 380-900 nm. 
AIMIT                          G. Varros
  [ 1010] - Meteor tracker and slit-spectrograph. 
CCD spectrograph  ASTRO            P. Jenniskens
   [L1140] Needs one optically flat window BK7 (350-900 nm)
HDTV camera                        H. Yano
   [L1180] Needs one optically flat window Fused Quartz (300-900 nm)
       flexible mount, pointing up to 45 degree
flux counter                       C. Crawford
    [L1290] - Four stand alone cameras need one optically flat window on 
right side of plane (400-900 nm)
left side DC-8 layout
right side DC-8 layout

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