mesocyclones, centroids, storm tops, and hail indices are all automatically generated. In addition to the automatically generated remarks, Part C provides for optional  manual  entries.  Appendix  III  provides  a listing of definitions and symbols that are routinely used in the remarks section. Q66. Q67. Q68. Q69. Q70. Q71. Q72. Q73. Q74. Q75. REVIEW  QUESTIONS What do the plotted heights on the Echo Tops (ET)  product  indicate? What  is  displayed  on  the  Severe  Weather Probability  (SWP)  product? What is a mesocyclone? The Tornadic Vortex Signature (TVS) product is derived from what data? How long will the Storm Track Indicator (STI) product track an individual storm? What information does the Hail Index (HI) product  provide? What is the primary purpose of the Reflectivity Cross-section  (RCS)  product? How could the Reflectivity Cross-Section (RCS) product be useful to an observer? What information can be obtained from the Vertical Cross-Section (VCS) product in clear- air mode? What does the symbol "ZR " indicate in a Radar Coded  Message? WSR-88D  PUBLICATIONS LEARNING   OBJECTIVE:  Identify   the publications associated with the WSR-88D system. The Federal Meteorological Handbook No. 11 (FMH-11),   Doppler   Radar   Meteorological Observations, is the governing manual for Doppler weather radar observations and consists of four parts. Part   A,   System   Concepts,   Responsibilities.   and Procedures, explains the overall concept of the WSR- 88D  program  and  details  site  responsibilities  and outlines  general  procedures.  It  also  contains  default values  for  the  WSR-88D.  Part  B,  Doppler  Radar Theory   and   Meteorology,  contains   a   detailed description of the WSR-88D along with a functional overview  of  system  components.  It  also  contains valuable  information  on  the  interpretation  of  Doppler velocity patterns. Part C, WSR-88D Products and Algorithms,   describes   the   various   products   and algorithms of the WSR-88D, and provides information on the different operational modes. Part D, WSR-88D Unit  Description  and  Operational  Applications, provides  an  in-depth  description  of  the  various components  of  the  WSR-88D  and  discusses  the operational  applications  of  meteorological  and  non- meteorological  echoes. The  Operator’s  Handbook,  Principal  User Processor,  consists of three volumes and is the best guide to learning the operation of the PUP workstation. Volume I contains information on the graphic tablet and   Volume   II   contains   information   on   the applications terminal. Volume III details information on the system console. SUMMARY In this chapter, we covered the WSR-88D Doppler weather radar system. We began with a discussion of electromagnetic energy and radar theory. Then we discussed the basic principles of radar propagation and the  effects  of  atmospheric  variables  on  this  propagation. We then introduced you to Doppler radar theory and discussed  the  configuration  and  communications system of the WSR-88D. We completed the chapter with an overview of the strengths and limitations of the products  available  from  the  WSR-88D. 2-55