(meteorobs) Wesley, Swift R. -Request for contact.

[stange34 at sbcglobal.net]

Thankyou Wes.

I will not use the IR dome except for experimental  daylight camera 
projects.

You have clarified what I was not sure of, or familiar with.

Larry
YC Sentinel

----- Original Message ----- 
From: "Swift, Wesley R. (MSFC-NNM05AB50C)[RAYTHEON]" <Wesley.Swift at nasa.gov>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: 2007/03/19 09:00
Subject: RE: (meteorobs) Wesley, Swift R. -Request for contact.


Strange34,

Saturation cannot be avoided with bright meteors since there is
no maximum meteor brightness.  Reducing the signal using filters only
reduces the number of meteors one will catch.  A #25 red might help
reduce city glow a bit.  IR filters will rarely help since there is a
lot of natural NIR in the night sky and it will tend to filter out the
slower meteors that don't excite airglow.  Furthermore, most afordable
all sky lenses are lousy in the IR.   The best one can do is to set up
the equipment so that enough stars are available for location and
calibration and let her fly.  There are methods to estimate the
photometric intensity of saturated meteors but they require laboratory
calibration of the camera and lens used.

Wes


-----Original Message-----
From: meteorobs-bounces at meteorobs.org
[mailto:meteorobs-bounces at meteorobs.org] On Behalf Of
stange34 at sbcglobal.net
Sent: Thursday, March 15, 2007 2:13 AM
To: meteorobs at meteorobs.org
Subject: (meteorobs) Wesley, Swift R. -Request for contact.

Would like your opinion on best night-time dome choice to avoid camera
saturation(large fireballs), using one of two  pass-band types, vs their
reduction in star field intensities.

Camera is  HiCam HB-710E, infra-red (or) clear dome over a Rainbow
L163VDC4P fisheye lens. Mag 3 sky.

re: Your NASA reports leading to Meteor44.

stange34 at sbcglobal.net
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