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Off-line Sounding Data Products
The main parameters in the off-line data products are identical to those contained in the NRT Data Products.
The Off-line Data Products have been processed to a different specification than the NRT Data Products,
including reprocessed satellite orbits. The off-line products, improved compared to the NRT products,
are delivered less than 30 days after measurement, making them unusable for NWP, but the choice for climate researchers.
| Bending angle |
| Quantity | Values | Remarks |
| Units | radians (rad) |
| Domain | 0-80 km Surface to 0.01 hPa |
| Range | -0.0001 to 0.05 rad |
| Precision | 0.1 µrad |
| Vertical sampling | 5 Hz |
| Accuracy | 0.4 % or 1 µrad | whichever is greatest. |
| Refractivity profile |
| Quantity | Values | Remarks |
| Units | Refractivity units (N) | Neutral atmosphere |
| Domain | 0-80 km | Surface to 0.01 hPa |
| Range | 0-450 N-units |
| Precision | 0.1 N-units |
| Vertical sampling | 0.5 km |
| Accuracy | 0.5 N-units or 0.15 % | whichever is greater |
| Temperature profile |
| Quantity | Values | Remarks |
| Units | Kelvin (K) |
| Domain | 0-80 km | Surface to 0.01hPa |
| Range | 180-350 K |
| Precision | 0.1 K |
| Vertical sampling | 0.5 km | depends on background pressure levels |
| Accuracy | 0-5 km, 5-30 km, 30-40 km, 40-50 km, 50-80 km | 2 K, 1 K, 1-3 K, 5-10 K,5-10 K |
| Specific humidity profile |
| Quantity | Values | Remarks |
| Units | kg/kg | Specific humidity |
| Domain | 0-15 km | Surface to 100 hPa |
| Range | 0-50 g/kg |
| Precision | 0.001 g/kg |
| Vertical sampling | 0.5 km | depends on background pressure levels |
| Accuracy | 5 % or 0.1 g/kg | whichever is greatest |
| Pressure profile |
| Quantity | Values | Remarks |
| Units | hectopascals (hPa) |
| Domain 0-80 km Surface to 0.01 hPa |
| Range | 0.01-1100 hPa |
| Precision | 0.001 hPa |
| Vertical sampling | 0.5 km | depends on background pressure levels |
| Accuracy | 0.1 % or 1hPa | whichever is greatest |
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