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Q: Solunar Table Calculations ( Answered ,   1 Comment )
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 Subject: Solunar Table Calculations Category: Computers > Algorithms Asked by: kevo1957-ga List Price: \$30.00 Posted: 13 Jan 2004 09:41 PST Expires: 12 Feb 2004 09:41 PST Question ID: 295970
 ```I'm looking for some information on calculating solunar tables to identify prime fishing times. There are a lot of solunar tables available on the web, but I would like to calculate a table myself.```
 Subject: Re: Solunar Table Calculations Answered By: aht-ga on 13 Jan 2004 20:44 PST Rated:
 ```kevo1957-ga: Thank you for your question regarding how to make your own Solunar Tables. An excellent resource to familiarize yourself with before embarking on this trip is: Fishing and Hunting Solunar Times http://www.solunar.com In particular, please read the site owner's testimonial on how he came about the "secret" of creating Solunar Tables, here: http://www.solunar.com/Bucher.htm About half-way down the page, he mentions that there are several key factors that go into creating a Solunar Table: 1) Knowing to the minute when the sun and moon each rise and set; 2) Knowing when the full or new moon occurs; 3) Knowing the local weather conditions; 4) Knowing the change in photoperiodism (the ratio of daylight to darkness for a given day). also, the theory here: http://solunar.com/TheSolunarTheory.htm So, it would seem that in order for you to develop your own Solunar Tables, you will need ways to find out these four things. At this point, I should point out that the easiest way to make your own Solunar Tables would be to buy the software that is sold on that website, or subscribe to their customized e-mail service. However, in case you are interested in how to go about making your own from scratch, here is some additional information: -------------------- SUN/MOON RISE/SET First, you need a good way to determine the sunset, sunrise, moonset, and moonrise times for the exact location where you want to fish. For this, I suggest you call out the Navy... or at least use their website: Sun or Moon Rise/Set Table for One Year http://aa.usno.navy.mil/data/docs/RS_OneYear.html Use Form B with the exact longitude and latitude of your secret fishing spot for best results (although, the nearest town is probably good enough). Please note that all times are relative to Greenwich Mean Time, which means you will need to adjust for Daylight Savings Time if your area observes that: Daylight Savings Time - When do we change our clocks? http://webexhibits.org/daylightsaving/b.html -------------------- FULL/NEW MOON For the moon's phases, we go back to the Navy: Phases of the Moon http://aa.usno.navy.mil/data/docs/MoonPhase.html#y2004 -------------------- LOCAL WEATHER CONDITIONS This is the toughest one, and is something that you cannot compute into the Solunar Table too far in advance. Instead, you need to simply keep an eye on the local weather forecasts, and use your "gut feel" for when a shift in weather will coincide with the sun/moon rise/set times. The Weather Channel http://www.weather.com/ -------------------- PHOTOPERIOD The photoperiod is simply the ratio of daylight to darkness. For example, if the sun rises at 7:00am, and sets at 7:00pm, then there are twelve hours of daylight, and twelve hours of darkness, for a ratio of 1:1. All that this particular factor accounts for, then, is the change in seasons over the course of the year. ==================== If you take a look at some of the free solunar tables on http://www.solunar.com (available free for each state and province in N.America) you can then get a feel for how this works. However, as indicated on the page describing the solunar theory, the actual major fishing times are calculated by charting the "upper and lower meridian passage of the resultant gravitational (tidal) force". The minor fishing times are "when these forces are rising or setting on either horizon". So, what that means is that a major period coincides with what would be high or low tide if you were on the coast. To calculate these times, you need to plot the positions and relative gravitational forces of the sun and moon based on their rise and set times, as adjusted to the local sidereal time (what the time would really be if we didn't have time zones to keep us from adjusting our watches ever few miles when moving east or west). Gravity and Tides http://www.clupeid.demon.co.uk/tides/simple.html - according to this site, the force of the Sun on the Earth is approximately one-half the force of the Moon, which needs to be factored into the plot Local Apparent Sidereal Time http://tycho.usno.navy.mil/sidereal.html - calculate the apparent sidereal time for the longitude of your fishing spot, that will give you the number of minutes' difference between sidereal time and standard time --------------------- All of this can be done in Excel, but setting up the spreadsheet would require quite a bit of math. All in all, buying either the e-mail subscription or the software from solunar.com is probably your better option. However, you now have the information to do-it-yourself if you really want to! Regards, aht-ga Google Answers Researcher```
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 Subject: Re: Solunar Table Calculations From: byrd-ga on 14 Jan 2004 08:37 PST
 ```Hi Kevo, I had your question locked for quite some time yesterday and had an answer nearly finished when I somehow lost the lock. How, I?m still not sure. I did experience a computer crash that took awhile to resolve, but even losing one?s internet connection isn?t supposed to affect a lock. Somehow it did, though, and by the time I got back online, the lock had been acquired by another Researcher, who subsequently answered your question. However, since I put so much time into it, and since the answer I prepared had a number of links not included above, I?ve decided to post it in its entirety here, so as not to waste the information, and in hopes that some of it may be of additional use to you. There will, of course, be some duplication of sources, but also some additions. -------------------------------------------------------------------------- The ?Solunar Theory? originated with John Alden Knight, who first advanced his ideas in 1926. After some years of trial and error, including identifying and examining over 33 potential factors, he patented and published the first ?Solunar Tables? in 1936, and held a monopoly until his patent expired. Here are two articles you might like to read, as they have some good information not only on the history of Solunar Tables, but on the types of data Knight used (and discarded) in constructing them. It is probably good background information for you to have if you?re going to attempt to create your own tables. --From ?In-Fisherman,? an answer to a question on solunar calendars: http://www.in-fisherman.com/interactive/editors/ask_editors/ --From ?Fishing Florida Online Magazine,? ?Solunar Theory Explained.? http://capmel.com/solunar.htm -------------------------------------------------------------------------- I did try to locate the original patent, but without success, as any patent prior to 1976 can only be located by number, not by name or subject or any other term. However, if by some good fortune you should somehow stumble across the patent number, the search page for the U.S. Patent Office is here: http://www.uspto.gov/patft/index.html Fortunately, Knight?s patent has now expired, however, which makes his information available to all, and as the articles above state there are many imitators. But nearly all use a process similar to Knight?s for generating their tables. So by reading material available through the various vendors and sources that offer these tables to the public you can get an idea how they do it. It quickly becomes apparent that there are certain standard critical data used by all of them, and one thing nearly all have in common is that they derive much of this raw data from the U.S. Navy. Here is the Navy?s page where you can get ?...the times of sunrise, sunset, moonrise, moonset, transits of the Sun and Moon, and the beginning and end of civil twilight, along with information on the Moon's phase ...? for cities and towns within the U.S. and also for worldwide locations: This page is for data for one day: http://aa.usno.navy.mil/data/docs/RS_OneDay.html This page will return data for an entire year: http://aa.usno.navy.mil/data/docs/RS_OneYear.html Also, scroll down below the forms for further information. For example, it states, ?If you need rise/set or twilight times for a series of dates for a U.S. location, use our rise/set table program, which computes a one-page table covering an entire year.? Here is the main page where you can access the Navy?s data services, which should be able to provide you with all the raw data you need: http://aa.usno.navy.mil/data/ However, there are also a number of other alternative sources for data, including the following: --Here is a ?Solar and Feeding Time Calculator? for Ottawa, Canada, with instructions for interpolating the data to your location: http://www.igs.net/~mjw/outpost/solunar.htm --Here is a ?Moon Calculator? from ?Arkansas Stripers.? The author states, ?There are a lot of good solunar tables; but, they can never be printed to be accurate for exactly where you are fishing. The Moon Calculator can give you accurate times for any town that is close to where you will be fishing.? See it here: http://www.arkansasstripers.com/best_times_to_fish.htm --Another moon calculator, this one freeware that you can download, called ?MoonCalc 6.0,? states that it ?provides information relating to the position, age, phase, orientation, appearance and visibility of the moon for any given date, time and location on earth. It also provides the Julian Day Number, Magnetic Declination, time and direction of moonrise and moonset, interval between sunset and moonset, interval between sunrise and moonrise, date/time of astronomical new moon (conjunction), full moon, apogee and perigee and predicts the likelihood of visualising the young moon from a particular location. Data pertaining to solar and lunar eclipses in any year are also shown.? Download it here: http://www.starlight.demon.co.uk/mooncalc/ A sunrise/sunset freeware calculator for download: http://www.fv01.dial.pipex.com/suntimes.shtml A downloadable sun position calculator from Texas A&M University: http://astronomy.physics.tamu.edu/download/ -------------------------------------------------------------------------- Of course, once you have found the data, you?ll need to know how to interpret it so you can create the customized tables you want. Though the actual algorithms are protected, one good way to understand how solunar tables are generated is to see what various commercial enterprises do with the data. One, ?Solunar Services,? has a very comprehensive website and, although they are in business to sell the tables, or their software for generating them, they do give a lot of good information that would likely be of use to you in creating your own tables. The page is done in frames, so I can?t give you the exact link, but if you?ll go here: http://www.solunar.com/ and click on the ?FAQ? section on the left, you?ll find a lot of good info. Read through other portions of the site as well; it?s one of the best. Here?s a very good article on understanding and practical use of raw solunar data, from ?Angler World.? It?s slanted toward the bass fisherman, but is very useful in general as well: http://www.wmi.org/bassfish/articles/T174.htm This example of solunar tables for Galveston, TX shows how the data may be plotted, and scrolling down below the tables you will find much detailed explanation: http://www.texasprimetimes.com/Texas_Feeding_Tables/texas_feeding_tables.html#Whatis Here are a few other tables (with additional information) that could serve as references/models on how to set one up: http://www.southforkresort.net/Information/solunar_times.htm http://www.texasoutdoorsjournal.com/hunt_fish_tables.htm http://www.lake-online.com/solunar/charts.htm (click on links on left side) -------------------------------------------------------------------------- However, maybe one of the best sources for learning how best to use the data would be the originator of solunar theory, Knight himself. And you?re in luck because he wrote a book explaining his theory, which is still the leading authority on solunar theory. It?s called, ?Moon Up, Moon Down,? published in 1942. Amazon lists the book, but says it is currently out of stock. This site says so also, but offers to order one for you: http://www.venturapacific.net/cgi-bin/index/0040981.html But this site appears to have it in stock, along with several other of Knight?s books: http://www.alibris.com/search/search.cfm Just fyi, here?s the Library of Congress listing of all Knight?s books and writings: http://catalog.loc.gov/cgi-bin/Pwebrecon.cgi?SC=Author&PID=21584&SA=Knight,+John+Alden,+1890-1966.&SA=Knight,+John+Alden,+1890-1966.&BROWSE=1&HC=13&SID=7 Here?s another great site, that has a copy of Knight?s original solunar tables in booklet form, along with explanations of how to use them. Price is only five bucks! Scroll about ¾ of the way down the page to find it: http://www.pastikas.com/acatalog/Books.html -------------------------------------------------------------------------- Finally, you might like to consider some solunar tables software, which will produce custom tables from your data. Here are a few freeware/shareware ones for you to try: --SOLUNAR TABLE CALCULATOR 1.2.1 http://www.simtel.net/product.php?url_fb_product_page=59182 --FISH BYTE 5 http://www.brothersoft.com/Home_Education_Hobbies_FishByte_21904.html --FISH BYTE 5.3 http://www.softwaremirror.com/showsw.php?sw=http://www.HeuristicResearch.com/fbh.exe --FISHING BUDDY ? FISHING JOURNAL AND PLANNER 1.0 (has a ?Solunar Wizard? that will do solunar calculations): http://www.tucows.com/preview/299537.html And here are a couple available for purchase: --Check ?Solunar Services? at their website, given above also, and click on ?Software? on the lefthand side (\$32.25): http://www.solunar.com --?Fish ?In Time 2? (\$22.50): http://www.profishermen.com/software.htm -------------------------------------------------------------------------- As I said, I hope you will find this additional information useful in conjunction with the answer above. Please note search terms provided below, should you wish to do any further looking around yourself for more info on this topic. Best wishes and good luck! Byrd Search terms that yielded the most useful results: solunar theory solunar calculate OR calculation OR calculating ?solunar times? calculate OR calculation OR calculating solunar times OR periods sun moon calculator buy book "moon up moon down" OR "John Alden Knight"```