Russian Spy Plane Studies Canada

There exists a Treaty on Open Skies in which Canada and Russia are a part of. And if you are a State Party in this treaty you may fly over another State Party's air space with a military plane, as long as it is unarmed. And it is allowed to have an array of imagery systems and spy equipment so it can observe any objects or places of interest or concern.

Countries who joined the treaty are:  Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Canada, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Georgia,Germany, Greece, Hungary, Iceland, Italy, Latvia, Lithuania, Luxembourg, Netherlands, Norway, Poland, Portugal, Romania, Russian Federation, Slovak Republic, Slovenia, Spain, Sweden,Turkey, Ukraine, United Kingdom, and United States