Knowing where the sun is at in the sky, with high accuracy, is at the core of all solar energy research, whether for site planning, or real time aiming of the most sophisticated concentrating receivers, heliostats, and photovoltaic tracking systems. Sun Position meets this need with two well-documented, easy-to-implement and easy-to-translate Visual Basic algorithms. For most applications the concise 0.02 degree accuracy code works very well. However, for the most exacting requirements, Sun Position also presents a precision algorithm accurate to within 0.00003 degrees. Sun Position will be a valuable resource for programmers and solar engineers of this century.
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Book Description
Editorial Reviews
About the Author
John Clark Craig, author of many computer programming books for Microsoft, has also programmed solar algorithms for several of the world's largest solar energy projects, located all over the world. While developing control and monitoring software systems for these projects, John constantly searched for the best algorithms and improved code for determining accurate sun position. Most of the available documentation was not easy to use, with bits and pieces of algorithms here and there, mixed in with poorly explained terminology, and with very little guidance for translating to other programming languages. John vowed to write Sun Position as the reference book he wished he had all along, with easy to read and easy to translate code, check points, validation test cases and debugging help.
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More About the Author
John Clark Craig has authored more than a dozen successful computer programming books for Microsoft Press and O'Reilly Media. John has also enjoyed working as a software engineer on many world-class solar and wind energy projects. Two of his projects were featured on the covers of Scientific American and Popular Science magazines. He's also the award-winning inventor of LucidLights and LucidBrakes, brilliant LED-based products you'll be seeing soon in stadiums and events, and helping to make bicycles safer world-wide.
John and his wife EJ co-authored Secrets to Creating Passive Income, the best selling book that's helping people help themselves by cashing in on the hundreds of opportunities around us all, just waiting to be tapped in to! John passionately wants to help everyone discover that they can actually do the things they love while collecting passive income.
John and his wife EJ co-authored Secrets to Creating Passive Income, the best selling book that's helping people help themselves by cashing in on the hundreds of opportunities around us all, just waiting to be tapped in to! John passionately wants to help everyone discover that they can actually do the things they love while collecting passive income.
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Most Helpful Customer Reviews
5 of 5 people found the following review helpful:
5.0 out of 5 stars
Sun Position review,
This review is from: Sun Position - High accuracy solar position algorithms - a resource for programmers and solar energy engineers (Programming by Example) (Kindle Edition)
"This book is an important addition to the literature on calculating the position of the sun at any position on earth at any time. Mr. Craig gives much credit to Jean Meeus's book "Astronomical Algorithms", a well known text on the subject. The two books are complementary in many ways, and I recommend both to anyone who needs to calculate sun position to any degree of accuracy. Essentially, Mr. Craig has simplified the rather complex sun position algorithms in Meeus's book into a set of Visual Basic programs. The book's simpler but lower accuracy algorithm is adequate for almost all solar energy applications and the higher accuracy algorithm is state of the art. When I wrote the sun position algorithm for my company five years ago, I used several reference sources, and certainly would have saved many hours if this book had been available. Bruce Rohr, President, Practical Solar, Inc., Boston, MA"
4 of 4 people found the following review helpful:
5.0 out of 5 stars
A Little Mistake is a Big Problem,
By Jay Leopold (SCOTTSDALE, AZ, US) - See all my reviews
This review is from: Sun Position - High accuracy solar position algorithms - a resource for programmers and solar energy engineers (Programming by Example) (Kindle Edition)
John's book is crazy detailed ... and crazy important. If you are building a solar array, it's pretty important to point it at the Sun. However, the Sun is a moving target and that movement is insanely complex. You can figure it out for yourself ... and be wrong or let John Craig tell you how to do it. It's your choice. By the way, he gives you two choices ... the easy way that is incredibly accurate or the hard way which is so accurate that it's fun just to see how he does it. In either case, this is the definitive work on solar tracking software. Bravo to John and now ... go get a life!
4 of 4 people found the following review helpful:
5.0 out of 5 stars
"Sun Position" Demystifies Tracking the Sun,
This review is from: Sun Position - High accuracy solar position algorithms - a resource for programmers and solar energy engineers (Perfect Paperback)
Whether you are a new comer or an experienced professional, if you are interested in tracking the sun, John Clark Craig provides the basics and the programming for doing so in his new book, "Sun Position". What I especially like about this short book is that it includes the actual code for two algorithms in the text: high accuracy (3 x 10-5) and low accuracy (2 x 10-2) degrees for determining sun positions. Internet references for the codes are also provided and make it easy to copy onto a screen or document thereby reducing the potential for typing error.Craig follows up by providing step by step examples of each calculation into a Visual Basic program. Additional information is provided on setting up Visual Basic Express, and some common debugging tips are also included. This book is a sun-tracker's resource! It is a must-have for anyone working in solar energy, meteorology, atmospheric sciences or other related fields. Vi Brown, Principal & CEO, Prophecy Consulting Group, LLC, Mesa, AZ
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