Skip to main content

Table 6 Quality control criteria for the FCA of the SA experiment

From: MF and HF radar techniques for investigating the dynamics and structure of the 50 to 110 km height region: a review

Code Meaning
0 No error—analysis result ok.
1 Time series unsuitable for analysis (signal amplitude too low or interference present)
2 Signal to noise ratio < − 3 dB
3 Fading time >6 S
4 At least one cross-correlation function maxima lies outside end points
5 Percentage time discrepancy >35 %
6 \( {V}_c^2<0 \)
7 Ground diffraction pattern analysis breaks down
8 Apparent velocity magnitude V a  > 400 ms− 1
True velocity magnitude V t  > 200 ms− 1
9 Difference between apparent V a and true V t direction exceeds 40°.
10 V a  > 10V t
11 V t  > 1.5V a
12 Poor fit to cross-correlation function (CCF) maximum
13 At least one CCF maximum <0.2
14 Poor zero-lag auto-correlation function (ACF) interpolation
15 Insufficient number of lags on main peak of mean auto-correlation function (MACF) to estimate fading time
16 Poor fit to MACF
17 Secondary maxima in MACF >0.5 (oscillatory)
18 Mean ACF >0.5 at end lags
19 One or more CCF maxima exceeds 1.0