Term
| Where does control of the WSR–88D antenna occur? |
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Definition
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Term
| Name the six basic subcomponents that make up the RDA. |
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Definition
| The antenna, pedestal, radome, transmitter, receiver, and signal processor. |
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Term
| What determines the elevation steps used by the RDA’s antenna? |
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Definition
| The particular volume coverage pattern (VCP) being used. |
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Term
| Why would the height of the radome be different for each RDA location? |
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Definition
| The height depends on the location of the RDA to any nearby obstructions. |
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Term
| Describe the signal processor’s main job: |
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Definition
| It takes the raw analog data from the receiver and processes it into a digital base data. |
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Term
| The WSR–88D combines what two features during the clutter filtering process to distinguish between unwanted clutter and meteorological targets? |
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Definition
| A near zero Doppler velocity and small spectral dispersion. |
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Term
| Explain the process the RDA employs that can eliminate most range folding problems: |
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Definition
| It uses the target ranges found from the low PRF to properly place the velocity and spectrum width data gathered at high PRFs. |
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Term
| Which VCP is in the shallow precipitation group? |
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Definition
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Term
| The clear air mode contains two VCPs—VCP 31 and VCP 32. Both scan five elevations in ten minutes. What is the difference between the two? |
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Definition
- VCP 31 uses a longer pulse and a lower PRF to allow more power per pulse, resulting in increased sensitivity.
- VCP 32 uses a shorter pulse and a higher PRF to increase the Nyquist co-interval, therefore increasing the velocity resolution of the sample.
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Term
| Which algorithms are processed within the central processing unit? |
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Definition
| Velocity dealiasing and system algorithms: auto PRF, alert processing and loadshedding/product priority. |
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Term
| What RPG storage device can store up to three months or over 600 megabytes of product data? |
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Definition
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Term
| Where is control of the RPG executed? |
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Definition
| The Master System Control Function (MSCF). |
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Term
| Name two functions used by the MSCF to interface with the RPG. |
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Definition
| A monitoring function and an RPG system control function. |
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Term
| What are the different types of base data the RPG receives from the RDA via wideband communications link? |
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Definition
| Reflectivity, radial velocity, and spectrum width. |
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Term
| What functions are performed by the signal processing algorithms? |
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Definition
| Clutter filtering, range unfolding, and velocity dealiasing. |
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Term
| What are ports for narrowband links designated as? |
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Definition
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Term
What is the purpose of the following Large OPUP component?
Narrowband communication equipment: |
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Definition
| Includes dedicated nest assembly, dedicated modems and a Cisco Router. |
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Term
What is the purpose of the following Large OPUP component?
Dedicated modem nest assembly:
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Definition
| Supports transmission speeds up to 14.4 kbps. |
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Term
What is the purpose of the following Large OPUP component?
Router:
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Definition
| Provides data transfer between OPUP system and local base LAN. |
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Term
What is the purpose of the following Large OPUP component?
LAN switch:
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Definition
| Directs all inter-component messages. |
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Term
What is the feature(s) of the following Large OPUP component?
Sun 280R server: |
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Definition
| Uses 2 UltraSparc 1.2 Ghz processors. |
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Term
What is the purpose of the following Large OPUP component?
Uninterruptible power supply:
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Definition
| Ensures non-stop Alternating Current (AC) power. |
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Term
| What are the three OPUP configurations and where are they located? |
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Definition
- Large OPUP located at four centralized forecast facilities across the United States.
- Medium OPUP located at centralized forecast facilities in the Pacific for the Air Force and East and West Coasts for the Marines.
- Small OPUP at select Air Force locations.
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Term
| What is the advantage to using the UNIX operating system? |
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Definition
| Its ability to perform multi-task processing. This enables the OPUP system to perform a variety of tasks. |
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Term
| What are the three areas that the Status and Control GUI is divided into? |
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Definition
| The launch bar, the tab display area, and the status area. |
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