Table 3.
Error budget in the determination of the PICARD/SODISM solar radius (typical values in mas) with error types (random (R) or systematic (S)).
| Error source (error type) | 535.7 nm | 607.1 nm | 782.2 nm |
|---|---|---|---|
| Center of Venus (R) | 348 | 178 | 326 |
| Center of the Sun (R) | 14 | 11 | 16 |
| Planetary theory (S) | 5 | 5 | 5 |
| PICARD on-board timing (R) | 80 | 80 | 80 |
| Spacecraft position (R) | 0.1 | 0.1 | 0.1 |
| Distortion correction (R) | 10 | 5 | 10 |
 (combined uncertainty) |
362 mas | 201 mas | 341 mas |
Notes. The uncertainty budget is an aid for specifying the expanded measurement uncertainty. The individual measurement uncertainty factors are summarized, usually in tabular form, in the measurement uncertainty budget. 
is the combined standard uncertainty.
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