/[ascend]/trunk/models/johnpye/nrel/spa.c
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revision 2582 by jpye, Mon Apr 9 21:33:35 2012 UTC revision 2583 by jpye, Tue Apr 10 06:02:09 2012 UTC
# Line 1  Line 1 
1    /*
2    THIS CODE COMES FROM APPENDIX A.6 OF REPORT NREL/TP-560-34302
3    WHICH WAS OBTAINED FROM
4    http://www.osti.gov/bridge/servlets/purl/15003974-iP3z6k/native/15003974.PDF
5    
6    THE CODE HAS BEEN MODIFIED TO
7    (1) convert local functions to 'static' to reduce symbol exports in object code
8    (2) add functionality to allow Julian Day as input, instead of datatime fields.
9    */
10    
11  /////////////////////////////////////////////  /////////////////////////////////////////////
12  //      Solar Position Algorithm (SPA)     //  //      Solar Position Algorithm (SPA)     //
# Line 28  Line 37 
37    
38  ///////////////////////////////////////////////////////////////////////////////////////////////  ///////////////////////////////////////////////////////////////////////////////////////////////
39  //  //
40  //   NOTICE  // NOTICE
 //   Copyright (C) 2008-2011 Alliance for Sustainable Energy, LLC, All Rights Reserved  
41  //  //
42  //The Solar Position Algorithm ("Software") is code in development prepared by employees of the  //This solar position algorithm for solar radiation applications (the "data") was produced by
43  //Alliance for Sustainable Energy, LLC, (hereinafter the "Contractor"), under Contract No.  //the National Renewable Energy Laboratory ("NREL"), which is operated by the Midwest Research
44  //DE-AC36-08GO28308 ("Contract") with the U.S. Department of Energy (the "DOE"). The United  //Institute ("MRI") under Contract No. DE-AC36-99-GO10337 with the U.S. Department of Energy
45  //States Government has been granted for itself and others acting on its behalf a paid-up, non-  //(the "Government").
 //exclusive, irrevocable, worldwide license in the Software to reproduce, prepare derivative  
 //works, and perform publicly and display publicly. Beginning five (5) years after the date  
 //permission to assert copyright is obtained from the DOE, and subject to any subsequent five  
 //(5) year renewals, the United States Government is granted for itself and others acting on  
 //its behalf a paid-up, non-exclusive, irrevocable, worldwide license in the Software to  
 //reproduce, prepare derivative works, distribute copies to the public, perform publicly and  
 //display publicly, and to permit others to do so. If the Contractor ceases to make this  
 //computer software available, it may be obtained from DOE's Office of Scientific and Technical  
 //Information's Energy Science and Technology Software Center (ESTSC) at P.O. Box 1020, Oak  
 //Ridge, TN 37831-1020. THIS SOFTWARE IS PROVIDED BY THE CONTRACTOR "AS IS" AND ANY EXPRESS OR  
 //IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY  
 //AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE CONTRACTOR OR THE  
 //U.S. GOVERNMENT BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES  
 //WHATSOEVER, INCLUDING BUT NOT LIMITED TO CLAIMS ASSOCIATED WITH THE LOSS OF DATA OR PROFITS,  
 //WHICH MAY RESULT FROM AN ACTION IN CONTRACT, NEGLIGENCE OR OTHER TORTIOUS CLAIM THAT ARISES  
 //OUT OF OR IN CONNECTION WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.  
46  //  //
47  //The Software is being provided for internal, noncommercial purposes only and shall not be  //Reference herein, directly or indirectly to any specific commercial product, process, or
48  //re-distributed. Please contact Anne Miller (Anne.Miller@nrel.gov) in the NREL  //service by trade name, trademark, manufacturer, or otherwise, does not constitute or imply
49  //Commercialization and Technology Transfer Office for information concerning a commercial  //its endorsement, recommendation, or favoring by the Government, MRI or NREL.
 //license to use the Software.  
50  //  //
51  //As a condition of using the Software in an application, the developer of the application  //THESE DATA ARE PROVIDED "AS IS" AND NEITHER THE GOVERNMENT, MRI, NREL NOR ANY OF THEIR
52  //agrees to reference the use of the Software and make this Notice readily accessible to any  //EMPLOYEES, MAKES ANY WARRANTY, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY
53  //end-user in a Help|About screen or equivalent manner.  //AND FITNESS FOR A PARTICULAR PURPOSE, OR ASSUMES ANY LEGAL LIABILITY OR RESPONSIBILITY FOR THE
54    //ACCURACY, COMPLETENESS, OR USEFULNESS OF ANY SUCH INFORMATION DISCLOSED IN THE ALGORITHM, OR
55    //OF ANY APPARATUS, PRODUCT, OR PROCESS DISCLOSED, OR REPRESENTS THAT ITS USE WOULD NOT INFRINGE
56    //PRIVATELY OWNED RIGHTS.
57  //  //
58  ///////////////////////////////////////////////////////////////////////////////////////////////  ///////////////////////////////////////////////////////////////////////////////////////////////
59    
60    
61  ///////////////////////////////////////////////////////////////////////////////////////////////  ///////////////////////////////////////////////////////////////////////////////////////////////
62  // Revised 27-FEB-2004 Andreas  // Revised 27-FEB-2004 Andreas
63  //         Added bounds check on inputs and return value for spa_calculate().  //         Added bounds check on inputs and return value for spa_calculate().
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john.pye@anu.edu.au
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