That's an Eagle Jet not a Viper....You can tell because it looks like a 'Flying Tennis Court' (old nickname) along with a few other recce features: slanted side intakes, clipped wings, straight twin tail, lack of missile rails on stations 1 & 9 which are the wingtips on the Viper, radome is longer giving it a more bulbous appearance.
OK, so yeah I'm a retired Aerial Munitions Distributor sts. We used to have to take recce tests in NATO where they would flash a slide for 2 secs then you would have 5 secs to write down: Make, Model, Country by Fin Flash or other means, and Friend or Foe. Most of the pics were flyspecks so this one is relatively easy.
Still a good pic though,
Goblin
Goblin