America's Space Shuttle: Air Data System NASA Astronaut Training Manual (ADS 2102) (English Edition) [Kindle-editie] beoordelingen het boek quotes

This unique and historic document provides extraordinary detail about the Space Shuttle's air data system (ADS). The official NASA astronaut training manuals comprised a major part of the formal flight crew training process, and were used by flight controllers as well. These internal NASA manuals were produced by the Mission Operations Directorate (Space Flight Training Division branch) at NASA's Johnson Space Center. The manuals and workbooks are extremely detailed and comprehensive, and are designed for self-study. A full listing of all acronyms and abbreviations used in the text is included. They provide a superb way to learn about Shuttle systems, hardware, and operational procedures. Special emphasis on crew interaction with the displays, controls, and hardware is included.The purpose of the Air Data System (ADS) is to provide information about the movement and position of the orbiter in the lower atmosphere. This information affects various functions performed by the shuttle onboard Guidance, Navigation, and Control (GNC) software. In addition, air data is available to the flight crew via dedicated displays to assist the crew in monitoring and control of the orbiter. The ADS is designed to be used in GNC Major Modes 304, 305, 602, and 603. The ADS self-test, used to verify system health, is available in GNC OPS 8.The ADS consists of two deployable probes, one on each side of the orbiter nose, which sense four pressures: static (Ps), alpha center (P alpha C), alpha upper (P alpha u), alpha lower (P alpha L) and the temperature of the ambient atmosphere. These probes are connected by pneumatic lines to four Air Data Transducer Assemblies (ADTAs), which condition the sensed pressures and temperature measurements for use by GNC software. Information from each ADTA is transmitted to the orbiter General Purpose Computers (GPCs) via an associated Flight-Critical Forward Multiplexer/Demultiplexer (FF MDM).Each ADTA and its output undergoes a validation process to prevent the use of failed components or corrupted data. Additionally, since each of the ADTAs could supply all the required data, a selection process reduces the four input data streams to a single output. This function is performed by ADS Redundancy Management (RM) software.Once a valid single air data output set is selected, the ADS Subsystem Operating Program (SOP) applies various algorithms to arrive at the air data parameters for GNC software processing and crew display.