All archive functions may be selected via the alphanumeric (A)RCHIVE menu. The archive functions are used to record to optical disk and recall from optical disk: products, received background maps, and status message data. Only one non-auto archive function may be performed at a time per archive device. Monitor performance data is recorded onto a streamer tape rather than an optical disk.

PUP archived optical disks or RPG archived optical disks may be used at any PUP location. However, at a PUP or RPG, created optical disks can only be read, not written to. If archived products are to be read in by another PUP associated with a different RPG, it is possible to archive background maps with them. The background maps must be requested from the RPG over the dial-up communications line or read in from an optical disk in order to be able to archive them. Optionally, the other PUP may have the necessary set of maps prestored on optical disk. When reading an archive optical disk with products from another RPG, you must read the correct set of background maps off this or another optical disk before the products can be displayed with maps. Maps for the associated RPG can be read from optical disk into the associated background map file. Additionally, maps from up to three non-associated RPGs can be read from optical disk and be stored in auxiliary map files where they remain until they are replaced by retrieval of a selected map set from optical disk to a specified auxiliary map file.

Optical disks used in the Training mode are created using the write archive functions. If an optical disk is to be used for training, and the training is to be performed at a different PUP site than where the optical disk was made, follow the instructions in the previous paragraph on using optical disks at other locations. There are two types of archive devices associated with a PUP system, optical disk and streamer tape. The optical disk is the main archive device and is used for writing to and retrieval from optical disk, background maps (received from an RPG over a dial-up line), status messages, and associated/auxiliary map sets. The streamer tape device is used only for the archive of monitor performance file data.

Discussion of archiving optical disk and tape usage is beyond the scope of this text. For a detailed discussion of archiving optical disk and tape usage, referOperation Instructions Principal User Processor (PUP) Group/Doppler Meteorological Radar.

In this chapter, we first discussed nondoppler radar and the effects of wavelength and frequency on radar performance. Next we looked at wavelengths for weather and cloud detection radars followed by an examination of radar beam characteristics. A discussion of the development of Doppler radar was then presented, followed by an overview of the systems characteristics and many benefits. Some problems associated with Doppler radar were also discussed. The last section of this chapter dealt with principles of the Weather Surveillance Radar (WSR-88D), including alert areas and thresholds, data access, user functions, status and alerts, and the archiving of data.

The practical training publications, The WSR-88D System Concepts, KWXN-1003, and WSR-88D Products, KWXN-1004, produced by the United States Air Force Training School, Keesler Air Force Base, Mississippi, offer additional guidance and technical reference for the WSR-88D system, concepts, and products.

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