solarsystem.nasa.gov

Website:https://solarsystem.nasa.gov/
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Definitions (236)

1

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nrz


Non-return to zero. Modulation scheme in which a phase deviation is held for a period of time in order to represent a data symbol. See Chapter 10.
Source: solarsystem.nasa.gov

2

1   1

walking orbit


A spacecraft orbit that precesses, wherein the location of periapsis changes with respect to the planet's surface in a useful way. See sun-synchronous.
Source: solarsystem.nasa.gov

3

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a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z a


Acceleration.   a = Δ velocity / Δ time. Acceleration = Force / Mass
Source: solarsystem.nasa.gov

4

0   0

å


Angstrom (0.0001 micrometer, 0.1 nm).
Source: solarsystem.nasa.gov

5

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aaas


American Association for the Advancement of Science.
Source: solarsystem.nasa.gov

6

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aas


American Astronomical Society.
Source: solarsystem.nasa.gov

7

0   0

acceleration


Change in velocity. Note that since velocity comprises both direction and magnitude (speed), a change in either direction or speed constitutes acceleration.
Source: solarsystem.nasa.gov

8

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alt


Altimetry data.
Source: solarsystem.nasa.gov

9

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am


Attometer (10-18 m).
Source: solarsystem.nasa.gov

10

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amor


A class of Earth-crossing asteroid.
Source: solarsystem.nasa.gov


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