Can you identify those parts (sensors), on test aircraft and the purpose?

I have seen many photos with those sensors attached to the test aircraft., Can you provide why they are used and what do they measure?

enter image description here

Here is another example on SuperJet:

enter image description here

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edited Jun 22, 2015 at 9:08

I have seen many photos with those sensors attached to the test aircraft. Can you provide why they are used and what do they measure?

enter image description here imgur.com/xM4s7.jpg

Here is another example on SuperJet

enter image description here

Source Link

asked Jun 22, 2015 at 9:06

Can you identify those parts(sensors) on test aircraft and the purpose?

I have seen many photos with those sensors attached to the test aircraft. Can you provide why they are used and what do they measure?

enter image description here imgur.com/xM4s7.jpg