low flying/circling aircraft-night

[shootingstar]

Wonder at times in the middle of the night..ie. 2:00 am or 4:00 am, I can hear  low flying aircraft circling... what would they be doing in our area? THere are highrises all over the place..yes, there's parkland, open river, etc.

Now, I am aware the police have their helicopter they use....

During the day, our municipality did pay contractor to fly and take aerial photos of areas.  It is for infrastructure area planning, etc. Employees would get general group email of this annual project work.  It is all stored/mapped and some made available publicly.

[Longjohn ★]

Russian spy planes

[bikeman564™]

@Wilbur

[JerrySTL ★]

Don't worry about those that you can hear. It's the quiet Black Ops constantly flying over that's a worry.

[sheep_herder ★]

28 minutes ago, JerrySTL said:

Don't worry about those that you can hear. It's the quiet Black Ops constantly flying over that's a worry.

How about the ones you hear after they have already passed over?

[donkpow]

[Wilbur ★]

1 hour ago, bikeman564™ said:

@Wilbur

Morrison Air.  I cannot divulge what they do though. 

[JerrySTL ★]

39 minutes ago, sheep_herder said:

How about the ones you hear after they have already passed over?

That's just the difference between the speed of sound and speed of light. Sonic booms can be a problem though.

[maddmaxx ★]

At least the flying saucers don't make noise in the middle of the night.