Some basic questions about radio interferometer (Direction Finding)

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The discussion centers on the user's inquiries about interferometer technology, specifically missing formulas for rms angular accuracy and DF accuracy from a referenced article. The user seeks clarification on the optimal spacing between antennas, understanding that it should be large enough for accuracy yet small enough (less than λ/2) to prevent ambiguity. Responses confirm this generalization, noting that the complexity increases with more than two antennas. Additionally, the user asks about the term "gross error rate" in the context of interferometers, indicating a need for further explanation of this concept. Overall, the thread highlights foundational questions about interferometer design and terminology.
senmeis
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Hello,

I’m a beginner to interferometer technology. While reading the attached article about this technology I find two formulas are missing. Please help me with them.

1. On page 5-8.8: rms angular accuracy.
2. In Table 3 on page 5-8.9: DF Accuracy.

As far as I understand the space between antennas shall be
a. Great enough for better accuracy
and
b. Small enough (< λ/2) to avoid ambiguity.

Is that correct?

At last I have a question to „gross error rate“? What does it mean in interferometer? You can find this term here: http://www.faqs.org/patents/app/20090079634.

Thanks in advance
Senmeis
 

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senmeis said:
As far as I understand the space between antennas shall be
a. Great enough for better accuracy
and
b. Small enough (< λ/2) to avoid ambiguity.
Is that correct?
Yes, that is a correct generalisation.
When you employ more than two elements it becomes more complex.
 

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