Yep, its a weather radar!!
And it actually works too! I believe that it is the only non-dummy freeware weather radar out there right now! It also has modes for detecting terrain features as well...and a few other things that I need to get familiar with.
As for your question that you posted in the other set of screenshots,
according to my book
Tupolev Tu-154: The USSR's Medium-Range Jet Airliner, by Dmitriy Komissarov, the assembly of the actual prototype of the plane began in early 1968 (meaning that concept ideas where occuring in early '60's), and the maiden flight of the Tupolev Tu-154 took place on October 3rd, 1968. The plane then evolved into many different versions/upgrades, such as the generic Tu-154, Tu-154A, Tu-154K VIP, Tu-154B, Tu-154B-1,
Tu-154B-2 (Available from Project Tupolev), Tu-154B Salon (VIP), Tu-154S (freighter),
Tu-154M (as seen in screenshots also from PT), and a few others too!
According to wiki, the 727 first flew in 1963, and the Trident I believe first flew in the late 1950's.
Keep in mind though that these aircraft encorporated the best types of designs for the jobs that they were designed to do, and although you may believe they look like copies of eachother, each plane still has major differences, and to be honest, the closest similarity that I can see is that they all have three-engines and are for medium range jobs.
Try sticking the flightsim models of the Trident, 727, and Tu-154 right next to eachother and see how they look together! It's quite interesting. ;)
Also, in regard to the flightsim model: the Tu-154M shown here, and the Tu-154B-2 are both available from a freeware development group called Project Tupolev. Although it is freeware, many consider these two aircraft to be of high-quality payware quality, in part because literally
every system in the plane is modeled!!!
The factory that manages the construction, and maintenance of the real things in Russia even uses Project Tupolev's aircraft for their simulation purposes. :o
Both aircraft are available here, free of charge, but you can donate if you wish:
http://fs-proteam.com/Support forums:
http://www.protu-154.com/forum/The also have an early beta IL-62, but the quality is not to the level of the Tu-154's yet.
Also, if you do take the plunge in trying to learn these aircraft, I'll be glad to help you learn! (We need more Tupolev simmers!!) :)
Glad you enjoyed the shots,
-SeanTK