Post Reply 
Properties of a Pocket Calculator for Astronauts
09-12-2019, 06:50 AM
Post: #21
RE: Properties of a Pocket Calculator for Astronauts
Thanks for sharing this lot of knowledge and thoughts - which I want to summarize (please complete):

  • Display: LED/OLED displays seem to be very resistant (operating temperatures from -40 to +85 Celsius) and better than LCD displays. I remember Mark Watney's dying laptop on Mars but I also saw Sandra Bullock's LCD wrist watch working well in Earth's orbit. Apollo's AGC worked with 7 segment LED displays (5 digits).
  • Keyboard: Less and big keys - simple to understand/operate
  • Case: Plastic/Metal? Velcro strips?
  • Clock/Time Module: for alarms, timers, ...
  • Interface: Serial? - display signals

  • Acquisition and display of signals
  • Time/Alarm/Timer/Stopwatch
  • Oxygen calculations
  • Center of gravity (What for?)
  • Orbit calculations (Kepler's equation)
  • Landing, Reentry calculations
  • Trajectories
  • Proximity Operations
  • Tail - course deviation calculations
  • Payload arm operations

I'm looking now for more details to this kind of software. In Gene222's link to "Introduction to Orbital Flight Planning" are a lot of HP-specific programs. But I saw that this is not easy to follow and deeper knowledge in Physics and Math is required. Is there some "Space Flight Theory and Math for Dummies"?

Find all posts by this user
Quote this message in a reply
Post Reply 

Messages In This Thread
RE: Properties of a Pocket Calculator for Astronauts - deetee - 09-12-2019 06:50 AM

User(s) browsing this thread: 1 Guest(s)