Every plate that names a measurement should read it from the constant file. The sentence does not keep a private copy. If the page and the file disagree, the file wins and the page gets fixed. The planetary numbers in that file follow the NASA fact sheet. [1]

A blank is a result. Jezero has no landing elevation on Site dossiers because this sheet does not have a surveyed touchdown height, so it does not invent a pressure. A sort of that table is not a ranking.

The four classes

Class A is arithmetic you can rerun: an ideal-gas mass, a stoichiometric ratio, a division of two amounts you typed. Class B is a published figure used inside the model the paper stated, such as the fact-sheet datum pressure. Class C is an algorithm that has been checked against a published worked example. The Mars clock is Class C. Class D is an envelope. The long one-way radio delay on Light time is Class D because it is the top of an example mission, not a clock.

What this sheet is not

It is not a clearance to fly, a medical limit, or a drinking-water permit. It is not a weather forecast. It is not a live ephemeris. It does not copy map tiles. It does not name a best city. Perchlorates does not become a wash recipe. Subsurface ice does not become a tonnage. Landed mass is the vehicles that flew, not a design for the next one.

See also

References

  1. NASA Goddard Space Flight Center. Mars Fact Sheet. Updated 19 May 2025. The compilation behind the planetary constants. https://nssdc.gsfc.nasa.gov/planetary/factsheet/marsfact.html

Categories

Engineering