First see if disconnecting and then reconnecting your satellite connection gives you a different IP. It may or it may not, depends on the system they are using.
If you are a laptop user then maybe sign up for WiFi access at your local coffee shop. StarBucks has WiFi at most of their stores. I've been known to do my submits while sipping a latte at Starbucks.
Either that or just take turns submitting. You could have even days and he could have odd days or something like that.