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Aeronautical Meteorological Common sense |
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| (1) How many operational meteorological geosynchronous satellites are there in the world? |
| (1) How many operational meteorological geosynchronous satellites are there in the world? |
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There are five operational meteorological geosynchronous satellites in the world. They are MTSAT-2(Eastern Asia), GOES-E(Eastern America), GOSE-W(Western America) and two Meteosates (longitude 0 degree and 57 degrees). |
| (2) Can Meteorological satellites be used to detect radioactive material? |
| (2) Can Meteorological satellites be used to detect radioactive material? |
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Limited by receiving frequency, meteorological satellite images cannot be used to detect the radioactive material coverage directly. However, we can get the moving speed of clouds by meteorological satellites and use it to calculate the moving speed and covering range of radioactive material. |
| (3) Can every staff of ANWS request an account with password for Aeronautical Meteorological Service Page (AMSP)? |
| (3) Can every staff of ANWS request an account with password for Aeronautical Meteorological Service Page (AMSP)? |
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There are two classes of AMSP accounts-General Accounts and Staff Accounts. General Accounts are for users from aviation-related units and Staff Accounts are for staffs of CAA and its subordinate units. |
| (4) Can users access AMSP on any computer? |
| (4) Can users access AMSP on any computer? |
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Any computers with Internet access can be used to log into AMSP anytime anywhere. |
| (5) What is the definition of turbulence intensity? |
| (5) What is the definition of turbulence intensity? |
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AMSP computes the severity of turbulence using data from the WRF model. Various researchers have developed 6 indices to evaluate the presence and the severity of turbulence by numerical weather prediction model data, such as WRF data. By applying different weights on each indices, AMSP is capable of make reasonable forecasts of turbulence. The specific threshold value of each intensity category is:
Smooth: lower than 0.25
Light: between 0.25 and 0.370
Moderate: between 0.370 and 0.675
Severe: higher than 0.675
The upper algorithm is tuned for large to heavy weight aircrafts, among whom a B757 is about average size. Heavy aircrafts include B757, B767, B777, B747, A300, A310, A330, and A340. A B737 is in the “medium or large” category. Aircraft weight is defined by the wake vortex it generates. The ICAO categorizes aircraft as follows:
Heavy: weight >= 136,000 kg (300,000 lbs.)
Medium or Large: 7,000 kg < weight < 136,000 kg
Light: weight <= 7,000 kg (15,400 lbs.)
Therefore AMSP evaluate turbulence intensity according to forecast value, not the actual shaking felt by aircrafts in the flight. |
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