check to see if your device is connected to the internet, thats where the satellite maps are generated from
So I have the same issue when flying offline. Offline Google maps don't load for me in Explorer. From what I've read they are supposed to, but I just get a blank maps screen unless I navigate there while in the app and connected to Wifi. Google Maps itself finds the downloaded map area just fine... Not sure if this is a bug or intentional. LP