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Dip test
A first crude approach
The flag fs=2 is detected on the observation A(t2), the previous value A(t1) is also flagged fs=2, and the next previous value A(t0) is flagged fs=1.
If | A(t2) - A(t0) | < | A(t1) - A(t0) | then
set fs=9 on A(t1) set fs=4 on A(t2)
A(t1) receives a corrected value by interpolation. The interpolation method can be linear or by Akima algorithm.
Relevant parameters those subject to the step check (QC1-3a):
- 1 | AA
- 2 | BI
- 104 | RA
- 105 | RR_01
- 113 | SS_1
- 123 | RT_1
- 172 | PH
- 174 | POM
- 175 | PON
- 176 | POX
- 177 | PP
- 197 | QE
- 198 | QL
- 199 | QLX
- 200 | QO
- 201 | QOX
- 211 | TA
- 212 | TAM
- 213 | TAN
- 215 | TAX
- 221 | TG
- 222 | TGM
- 223 | TGN
- 225 | TGX
- 227 | TJM
- 262 | UU
- 264 | UN
- 265 | UX
- 81 | FF
- 85 | FM
- 86 | FX
- 87 | FX_1
- 88 | FX_6
- 89 | FX_12
- 90 | FG_1
- 91 | FG_6
- 92 | FG_12
- 93 | FX_X
- 94 | FG_X