العربية
中国
Français
Deutsch
Ελληνική
हिन्दी
Italiano
日本語
Português
Русский
EspañolWSR-74
WSR-74C radar from Central Illinois WFO
'WSR-74' RADARs are 'W'eather 'S'urveillance 'R'adars designed in 1974. The National Weather Service added them to the existing network of the WSR-57 model to improve forecasts and severe weather warnings.
| Contents |
| Radar properties |
| History |
| Radar sites |
| See also |
| References |
Radar properties
There are two types in the WSR-74 series, which are almost identical except for operating frequency.[1] The WSR-74C (used for local warnings) operates in the C band, and the WSR-74S (used in the national network) operates in the S band (like the WSR-57 and the current WSR-88D). S band frequencies are better suited for long range.
The WSR-74C uses a wavelength of 5.4 cm.[2] It also has a dish diameter of 8 feet, and a maximum range of 579 km (313 nm).
History
The WSR-57 network was very spread out, with 66 radars to cover the entire country. There was little to no overlap in case one of these vacuum-tube radars went down for maintenance. The WSR-74 was introduced as a "gap filler", as well as an updated radar that, among other things, was transistor-based.[3]
WSR-74C radars were generally local-use radars that didn't operate unless severe weather was expected, while WSR-74S radars were generally used to replace WSR-57 radars in the national weather surveillence network. When a network radar went down, a nearby local radar might have to supply updates like a network radar.[4] Corpus Christi became the first operational site for the WSR-74C on February 1, 1976.
128[5] of the WSR-57 and WSR-74 model radars were spread across the country as the National Weather Service's radar network until the 1990's. They were gradually replaced by the WSR-88D model (Weather Surveillance Radar - 1988, Doppler), constituting the NEXRAD network. The WSR-74 had served the NWS for two decades.
Thirteen WSR-74Cs still have not been decommissioned and, of those, eight remain in active use today. No WSR-74Ss are in the NWS inventory today, having been replaced by the WSR-88D. Some of these radars are in commercial use.
Radar sites
WSR-74 sites include the following two categories:[6][7]
| WSR-74C Site | Commissioned | Decommissioned |
|---|---|---|
| Abilene, TX (ABI) | April 30, 1997 | |
| Akron, OH (CAK) | November 15, 1995 | |
| Albany, NY (ALB) | November 2, 1995 | |
| Alpena, MI (APN) | December 9, 1996 | |
| Atlanta, GA (ATL) On a building between Hartsfield and downtown to this day. | February 1, 1996 | |
| Augusta, GA (AGS) | July 30, 1996 | |
| Austin, TX (AUS) | Late 1970's | October 13, 1995 |
| Baton Rouge, LA (BTR) | May 14, 1996 | |
| Beckley, WV (BKW) | January 12, 1996 | |
| Billings, MT (BIL) | Mid 1970's | May 30, 1996 |
| Bismarck, ND (BIS) | February 28, 1996 | |
| Burlington, VT (BTV) | January 29, 1998 | |
| Charlotte, NC (CLT) | September 17, 1996 | |
| Chattanooga, TN (CHA) | June 10, 1998 | |
| Cheyenne, WY (CYS) | April 24, 1996 | |
| Cleveland, OH (CLE) | November 15, 1995 | |
| Columbia, MO (COU) | June 19, 1996 | |
| Columbia, SC (CAE) | October 25, 1995 | |
| Columbus, GA (CSG) | April 3, 1996 | |
| Columbus, OH (CMH) | December 1, 1995 | |
| Concordia, KS (CNK) | November 9, 1995 | |
| Corpus Christi, TX (CRP) | February 1, 1976 | March 10, 1997 |
| Duluth, MN (DLH) | 1977 | March 25, 1997 |
| Erie, PA (ERI) | January 15, 2000? | |
| Fort Smith, AR (FSM) | July 7, 1998 | |
| Fort Wayne, IN (FWA) | July 8, 1998 | |
| Goodland, KS (GLD) | October 25, 1995 | |
| Harrisburg, PA (HRC?) | January 12, 1996 | |
| Hartford, CT (BDL) | November 2, 1995 | |
| Houghton Lake, MI (HTL) | December 9, 1996 | |
| Huntsville, AL (HSV) (Doppler capability after July 1991) | 1977. Replaced a WSR-3. | December 15, 1999? Now the ARMOR radar. |
| Indianapolis, IN (UZK) | February 28, 1996 | |
| Las Vegas, NV (LAS) | September 1, 1995 | |
| Los Angeles, CA (LAX) On top of the Federal Building in Westwood to this day. | May 15, 1995 | |
| Louisville, KY (SDF) | July 19, 1994 | |
| Lubbock, TX (LBB) | April 3, 1996 | |
| Macon, GA (MCN) | April 3, 1996 | |
| Madison, WI (MSN) At Madison Airport. | 1972 | May 7, 1996 |
| Marquette, MI (MQT) | July 16, 1996 | |
| Meridian, MS (MEI) | December 26, 1996 | |
| Mobile, AL (MOB) | October 12, 1995 | |
| Moline, IL (MLI) | August 30, 1977 | January 19, 1996 |
| Montgomery, AL (MGM) (Doppler capability after 1982) | June 4, 1996 | |
| Muskegon, MI (MKG) | August 13, 1996 | |
| Norfolk, NE (OFK) | March 25, 1997 | |
| North Platte, NE (LBF) | November 27, 1996 | |
| Omaha, NE (OVN) | 1977 | July 10, 1996 |
| Paducah, KY (PAH) At the Paducah Airport. | 1980's | February 23, 1996 |
| Phoenix, AZ (PHX) | August 15, 1994 | |
| Portland, OR (PDX) | January 30, 1996 | |
| Raleigh, NC (RDU) | December 22, 1995 | |
| Rapid City, SD (RAP) | November 4, 1996 | |
| Rochester, MN (RST) | January 9, 1997 | |
| San Angelo, TX (SJT) | October 1977 | April 22, 1997 |
| Savannah, GA (SAV) | February 11, 1997 | |
| Shreveport, LA (SHV) | June 5, 1996 | |
| Sioux Falls, SD (FSD) | 1976 | October 4, 1996 |
| South Bend, IN (SBN) | July 8, 1998 | |
| Springfield, IL (SPI) | October 16, 1980 | July 30, 1996 |
| Topeka, KS (TOP) | November 2, 1995 | |
| Tucson, AZ (TUS) | March 14, 1996 | |
| Tulsa, OK (TUL) | April 5, 1995 | |
| Tupelo, MS (TUP) | December 6, 1995 | |
| Waco, TX (ACT) | September 13, 1995 | |
| Waterloo, IA (ALO) | January 17, 1997 | |
| Wichita Falls, TX (SPS) | December 26, 1996 | |
| Williston, ND (ISN) | Mid 1970's | Not decommissioned |
| Worcester, MA (ORH) | April 5, 1995 |
| WSR-74S Site | Commissioned | Decommissioned |
|---|---|---|
| Alliance, NE (AIA) | January 17, 1997 | |
| Binghamton, NY (BGM) | September 26, 1995 | |
| Charleston, WV (CRW) WSR-74S providing local coverage | January 12, 1996 | |
| Chatham, MA (CHH) | April 5, 1995 | |
| Detroit, MI (DTW) | Replaced a WSR-57. | November 9, 1995 |
| Fargo, ND (FAR) | November 27, 1996 | |
| Jackson, KY (JKL) WSR-74S providing local coverage | After 1981 WFO commissioning? | July 1, 1997 |
| Key West, FL (EYW) | 1980. Replaced a WSR-57. | October 20, 1998 |
| Longview, TX (GGG) | March 14, 1996 | |
| Marseilles, IL (MMO) (Doppler capability) | November 1, 1974. Replaced a WSR-57 at Chicago. | January 19, 1996 |
| Memphis, TN (MEG) At East Memphis/Agricenter site | January 1986. Replaced a WSR-57. | June 21, 1995 |
| Monett, MO (UMN) | 1970 | February 1, 1996 |
| Patuxent River, MD (NHK) At Patuxent River NAS | Early 1980s. Replaced a WSR-57 at Washington, DC. | November 17, 1995 |
| Portland, ME (PWM) | Replaced a WSR-57. | September 13, 1995 |
| San Juan, Puerto Rico (SJU) WSR-74S providing local coverage | February 26, 1999 | |
| Volens, VA (VQN) | December 1, 1995 | |
| West Palm Beach, FL (PBI) WSR-74S providing local coverage | October 13, 1995 |
See also
References
1. http://www.its.bldrdoc.gov/pub/oprad/sect7.pdf
2. Paul Sirvatka. "WSR - Weather Surveillance Radar." Radar. College of DuPage. 4 Apr. 2006
3. Roger C. Whiton, et al. "History of Operational Use of Weather Radar by U.S. Weather Services. Part I: The Pre-NEXRAD Era." Weather and Forecasting: Vol. 13, No. 2, pp. 219–243. 19 Feb. 1998. American Meteorological Society. 5 Apr. 2006
4. Stormtrack.org Forum 9498
5. http://sysu1.wsicorp.com/unidata/intro.html
6. NWS Modernization Committee. "Toward a New National Weather Service - Assessment of NEXRAD Coverage and Associated Weather Services".
7. Stormtrack.org Forum 10344
This article provided by Wikipedia. To edit the contents of this article, click here for original source.
psst.. try this: add to faves
