Passage: Watney takes the rover to retrieve the nearby Pathfinder probe, which fell silent in 1997. Using Pathfinder's camera and  motor, he establishes rudimentary two-way communication with Earth, first using simple signs, and then sending and receiving ASCII in hexadecimal. NASA sends a software patch to link the rover with Pathfinder and communicate via text. Watney becomes angry when he learns that the crew has not been told of his survival, and Sanders reluctantly lets Henderson finally inform them.

Question: What causes Watney intense anger?
when he learns that the crew has not been told of his survival