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首页> 美国政府科技报告 >Insolation data manual: Long-term monthly averages of solar radiation, temperature, degree-days and global K(sub T) for 248 National Weather Service stations and Direct normal solar radiation data manual: Long-term, monthly mean, daily totals for 235 Nati
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Insolation data manual: Long-term monthly averages of solar radiation, temperature, degree-days and global K(sub T) for 248 National Weather Service stations and Direct normal solar radiation data manual: Long-term, monthly mean, daily totals for 235 Nati

机译：日照数据手册：248个国家气象服务站的太阳辐射，温度，度日和全球K（sub T）的长期月平均值和直接正常太阳辐射数据手册：长期，月平均值，每日总数为235那提

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摘要

The Insolation Data Manual presents monthly averaged data which describes the availability of solar radiation at 248 National Weather Service (NWS) stations, principally in the United States. Monthly and annual average daily insolation and temperature values have been computed from a base of 24--25 years of data, generally from 1952--1975, and listed for each location. Insolation values represent monthly average daily totals of global radiation on a horizontal surface and are depicted using the three units of measurement: kJ/m(sup 2) per day, Btu/ft(sup 2) per day and langleys per day. Average daily maximum, minimum and monthly temperatures are provided for most locations in both Celsius and Fahrenheit. Heating and cooling degree-days were computed relative to a base of 18.3 C (65 F). For each station, global (bar K)(sub T) (cloudiness index) values were calculated on a monthly and annual basis. Global (bar K)(sub T) is an index of cloudiness and indicates fractional transmittance of horizontal radiation, from the top of the atmosphere to the earth's surface. The second section of this volume presents long-term monthly and annual averages of direct normal solar radiation for 235 NWS stations, including a discussion of the basic derivation process. This effort is in response to a generally recognized need for reliable direct normal data and the recent availability of 23 years of hourly averages for 235 stations. The relative inaccessibility of these data on microfiche further justifies reproducing at least the long-term averages in a useful format. In addition to a definition of terms and an overview of the ADIPA model, a discussion of model validation results is presented.

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