Re: (meteorobs) aurora map

To: meteorobs@jovian.com
Subject: Re: (meteorobs) aurora map
From: James Wray <star@foothilldot net>
Date: Fri, 09 Jun 2000 14:03:11 -0700
In-Reply-To: <001601bfd243$bd788fe0$0ce1d940@swbelldot net>
References: <Pine.SOL.4.10.10006081738230.11490-100000@shell2>
Reply-To: meteorobs@jovian.com
Sender: owner-meteorobs@jovian.com

Hi!!

Not to worry, I would guess.  From "passes each Pole once per hour" I infer
a 120 min period which works pretty well of course.  Betcha someone out
there actually KNOWS the real scoop on this thing.  Just getting my 2-cents
in here.

Cheers!!

Jim Wray

SciTech Astronomical Research

----------------------------

At 01:51 PM 6/9/00 -0500, you wrote:
>----- Original Message -----
>From: "Aaron Price" <aaronp@shoredot net>
>To: <meteorobs@jovian.com>
>Sent: Thursday, June 08, 2000 4:40 PM
>Subject: (meteorobs) aurora map
>
>
>> Its from the NOAA POES satellite and I think passes each pole once per
>hour
>> or so.
>
>Not nearly so frequently, Aaron. No satellite of Earth can orbit that fast.
>The period of any Earth satellite (T) in minutes is related to its altitude
>(h) in km by the equation
>
>T = 5.27 x 10*-9 (6.37 x 10*6 + h x 10*3)*3/2
>
>A satellite at altitude 100 mi = 161 km has a period of 88.5 minutes. To
>have a period of only 60 minutes, a satellite would need a much smaller
>orbital radius. In fact, it would have to orbit 1400 km inside the Earth's
>surface but with all the Earth's mass within its orbit.
>
>Paul O. Johnson
>
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Follow-Ups:

Re: (meteorobs) aurora map

From: "Paul O. Johnson" <pojhome@swbelldot net>

References:

(meteorobs) aurora map

From: Aaron Price <aaronp@shoredot net>

Re: (meteorobs) aurora map

From: "Paul O. Johnson" <pojhome@swbelldot net>