Observation 13729988: FORMOSAT 7-2 (44351)

Satellites & Observations Observations
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Regarding Observation 13729988 … hello friends can u pleasze confirm thats a good signal:) thanks

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any pro pls

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(teach a person to fish… teach a person to fish…)

Your baseline rule of thumb for “Good Obs Or Not” is this: Is there a straight line of SOMETHING down the middle. That something could be a single line (like in your example), a double line of something, a series of weird bubbles… but if it’s in a straight line down the center, you’re good. If you see lines going COMPLETELY across the waterfall, that’s NOT a satellite signal… for our purposes at least. It’s most likely terrestrial interference. If you see a wavy line making a roughly S-curve, it’s most likely terrestrial interference.

A couple notes:

  1. If you look REAL carefully at the bottom of the waterfall, you’ll notice this observation is a little off center. That probably means your local oscillator is a little off. That means you’re not tuned in correctly, but you’re off all the time… so not terrible. That can be corrected… do some research and you can figure it out.
  2. When a satellite is getting close to re-entering (i.e. SilverSat), the TLE will change rapidly… more rapidly than we can accommodate and circulate. So the signal won’t be a straight line down the center. It’s still a good obs, because you expect and can explain the deviation. See this obs:
  1. See this link for many examples:
4

thank you chris, so based on your rule of thumb, this looks like a good signal:))

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