Runway Visual Range in Feet | Accuracy |
---|---|
<1,300 feet | ±30 feet |
1,300 through 2,600 feet | ±80 feet |
>2,600 feet | ±10 % |
Visibility from Standard Visibility Sensor |
Percentage of Data Within or Exceeding Given Range | ||
---|---|---|---|
At least 80% Within | No more than 18% Exceed |
No more than 2% Exceed |
|
0 through 1¼ | ±¼ | ±½ | ±1 |
1½ through 1¾ |
+¼, -½ | +½, -¾ | ±1 |
2 through 2½ | ±½ | ±1 | ±1 |
3 | +½, -1 | ±1 | ±1 |
4 through 10 | ±1 RV¹ | ±2 RV¹ | ±2 RV¹ |
RV = Reportable value, all other values in miles. |
Parameter | Units of Measure |
Range | Accuracy | Resolution |
---|---|---|---|---|
Direction | Degrees | 1° to 360° |
±5° when speed is >=5 knots |
10° |
Speed | Knots | 2 to 90 knots |
±1 knot up to 10 knots ±10% above 10 knots |
1 knot |
Parameter | Range | Accuracy | |
---|---|---|---|
Amounts | Heights | ||
Sky Condition | 0 - 12,000 ft. (minimum) | ±1 Reportable Value | ±3 Reportable Values |
Parameter | Range | Accuracy | Resolution |
---|---|---|---|
Temperature | -62 to -50 -50 to +50 +50 to +54 |
±1.1 ±0.6 ±1.1 |
0.1 0.1 0.1 |
Dew point | -34 to -24 -24 to -01 -01 to +30 |
±2.2 ±1.7 ±1.1 |
0.1 0.1 0.1 |
Parameter | Units of Measure |
Range | Accuracy | Resolution |
---|---|---|---|---|
Station Pressure | Inches of Mercury |
4 | ±0.02 | 0.0005 inch |
Altimeter Setting | Inches of Mercury |
4 | ±0.02 | 0.001 inch |
Sea-Level Pressure | Hectopascals | 136 | ±0.68 | 0.1 hectopascal |