Venera Images, VENERA 13 fully calibrated image Options

[vikingmars]

Here is the Venera 13 fully calibrated image, produced from raw imaging 3-filters data (note the 3 horizons at left well discernible). It was published inside "L'Astronomie Magazine" of Societe Astronomique de France.
Enjoy !

Attached thumbnail(s)

 

[vikingmars]

Well ljk4-1... I don't know about the "Venusquake", but the lander movement is real.
See it herewith enlarged 400% (a shift of 2 pixels vertically between Clear pan 2 and Clear pan 5).

Attached thumbnail(s)

 

[ljk4-1]

Well ljk4-1... I don't know about the "Venusquake", but the lander movement is real.
See it herewith enlarged 400% (a shift of 2 pixels vertically between Clear pan 2 and Clear pan 5).

I am not questioning the veracity of the movement, but I do have these two questions:

1. What made Venera 13 move, especially in such a short time period?

2. Why hasn't this movement ever been brought to attention or noticed before? Or did I just miss something in the literature?

Always a treat to find something new, even in images over two decades old - which reminds me to say, it's about time we put some more landers on Venus!

[tedstryk]

I am not questioning the veracity of the movement, but I do have these two questions:

1.  What made Venera 13 move, especially in such a short time period?

2.  Why hasn't this movement ever been brought to attention or noticed before?  Or did I just miss something in the literature?

Always a treat to find something new, even in images over two decades old - which reminds me to say, it's about time we put some more landers on Venus!

It also may have shifted as it settled after landing. I don't think expansion and a slight change in the track of the scanning photometer can be ruled out.

[JRehling]

It also may have shifted as it settled after landing. I don't think expansion and a slight change in the track of the scanning photometer can be ruled out.

My bet is that something inside the spacecraft changed. Also, can we exclude the possibility of a 2-pixel shift due to some un-venus-related processing? I can think of scads of ways that postprocessing would lead to such a shift.

If something did take place on Venus, note that these landers were very heavy, and moreover, in comparison to the local environment, also very cold -- they may have caused some contraction of materials in immediate contact with them.

[Bob Shaw]

My bet is that something inside the spacecraft changed.

Well, the scanning mechanism moved, the filters moved, the whole shooting match heated up... ...it's surely a tribute to the engineers that so few critical dimensions altered!