Entertaining and character-revealing....
21 nov 12:43pm
To: Mike Bara (email@example.com)
cc: Richard Hoagland (firstname.lastname@example.org)
Subj: That Second Viking Orbiter Image
I note that in your recent book AA on Mars (p.92) you hand-wavingly estimate the "walk" of the Viking Orbiter on successive orbits as "between 15 and more than 20.4 miles." Could you not have been more precise? Here -- allow me to do your math for you:
Orbit of Viking 1: Polar, 24.66 hours
Rotation period of Mars: 24.622 hours
Equatorial radius of Mars: 2110 miles
Latitude of Cydonia: ~40°N
During one Viking orbit, Mars rotates 360 x 24.66 / 24.622 degrees.
That's slightly more than a full rotation -- 360.55°.
So when Viking came around to 40°N latitude again, the "face" was 0.55° cross-track
Rotational circumference at 40° is 2.π.2210.cos40 = 2 x 3.1416 x 2210 x 0.766 = 10,636 miles
Walk for 0.55° = 10636 x 0.55 / 360 = 16.25 miles.
Given that the width of the frame on the ground is 34 miles, quite clearly you are in error when you write that there could have been no second image of Owen Mesa. Please see that the book is corrected for any second edition.
21 nov 2:36pm
From: Mike Bara
It was after dark at Cydonia, you fucking shitheap of an idiot
21 nov 2:50pm
To: Mike Bara
Not so, the planet had completed a full revolution plus a bit, so the sun angle would have been only slightly different.
Your insults, as ever, are of no interest.
Please see that the book is corrected at 2nd edn, if there is one. Thank you.
22 nov 10:49am
From: Mike Bara
Eat shit and die
Sent from my iPad