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Dip test - QC2d-1
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 |
| 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 |
| 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 |
Dip test flags
| Flag value | Definition | useinfo(2) consequence |
| fs=4 | Kontrollert. Mistanke om feil detektert i QC1-3. Ingen tilsvarende feil i QC2d-1. Ingen korreksjon. | Friskmeldt. |
| fs=5 | Kontrollert. Ingen mistanke om feil detektert i QC1-3. Mistanke om feil detektert i QC2d-1.Ingen korreksjon. | Originalverdi noe mistenkelig. |
| fs=9 | Kontrollert. Observert endring høyere enn testverdi. Korrigert automatisk. | Originalverdi sikkert feilaktig. |