Unit 4-2
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- (611) What is a typical unambiguous range limit for a doppler radar transmitting at a PRF of 700 pps?
- 116 NM
- (611) What is doppler dilemma in terms of selecting an operating pulse repetition frequency?
- trade off between velocity aliasing and range folding
- (611) What process is designed to eliminate range folding and velocity aliasing?
- post processing
- (612) The primary purpose of the clean air mode of operation is to
- support pilot weather briefings and sea surface operations
- (612) What is the selection criteria for the wsr-88d operating modes?
- clean air mode selected manually; precipitation mode is selected automatically or manually
- (612) The three phases associated with the precipitation mode are...
- approach, storm, and severe convective storm
- (613) In the wsr-88d radar, an elevation cut is
- a single full rotation of the antenna at a discrete elevation
- (613) In the wsr-88d radar, pulse recurrent interval (PRI) pattern waveforms are characterized into what three categories or groups?
- contiguous surveillance, contiguous doppler, batch
- (613) In the wsr-88d radar, scan strategies are embodied in various volume coverage (VCP) to
- optimize performance under specific meteorologic condition
- (614) What was considered base data generated by older conventional weather radar, such as the wsr-57 and wsr-74
- patterns of unanalyzed equivalent reflectivity
- (614) What are two parameters measured by the wsr-88d doppler radar that older weather radars could not measure?
- radial velocity and spectrum width
- (614) What wsr-88d weather products are derived from reflectivity, mean radial velocity, and spectrum width?
- base products
- (614) What wsr-88d weather product inlcudes contour presentations of reflectivity, echo tops, and wind shear?
- derived products
- (614) What is the difference between principal users and other users concerning access to wsr-88d weather products?
- other users have access to a limited set of products
- (614) What procedural access methods are used to let different groups of wsr-88d radar users share common dial-up interface ports?
- password protection and time-out limits
- (615) What is the advantage of the wsr-88d radar sytem over older weather radars?
- displays new fields of doppler velocity and derived airflow patterns