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Reviews Categories | Ham Software - Other than logging | SNAPMax PROPAGATION software Help


Reviews Summary for SNAPMax PROPAGATION software
SNAPMax PROPAGATION software Reviews: 1 Average rating: 5.0/5 MSRP: $FREEWARE
Description: FREEWARE: SNAPMax v5.01 calculates 1.5 to 45 MHz HF/MF radio propagation, including signal strength, signal-noise ratio and circuit quality, as well as MUF, LUF and FOT, and saves any three paths for future reference. Transmitter and receiver locations can be input either by call prefix or by latitude and longitude, and many can be selected by name too. Path loss analysis enables users to select different or better times, routes and frequencies, and gives a graphic breakdown of all noise sources. Other inputs are antenna gain, adjusted for take-off angle, and modulation schemes including digital modes, for assessing circuit quality, including multipath delay. The program supports long path, antipodean enhancement, and chordal hop. WWV ionospheric storm indexes (A or K) are used to determine polar path auroral losses, also MUF depression during storm events. E layer paths are assessed and ground-wave coverage is also calculated. Noise data for most major countries world-wide is provided, as is a simple graphic of probable noise levels across HF bands for any location. An expanded low frequency scale (2-12 MHz) improves low band displays for NVIS etc. MUF is determined using the Fricker (BBC) algorithms, losses being determined by George and Bradley's method using an internal world-wide vertical absorption map. An approximate MF algorithm is used for top-band. Gyro-frequency is also mapped, as are terrestrial reflection points to take correct account of reflection from ground or oceans. More detail is to be found in Crawford MacKeand's book "The Friendly Ionosphere", also from Tyndar Press, and detailed operating descriptions are included with the zipped file for SNAPMax. Finally, SNAPMax501 supersedes shareware SNAPMax3.63 and is now FREEWARE for any non-commercial uses. Crawford MacKeand WA3ZKZ, VP8CMY, ex-G4ARR
Product is in production.
More info: http://www.geocities.com/tyndar_press/index.html
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You can write your own review of the SNAPMax PROPAGATION software.

KJ6EB Rating: 5/5 Feb 12, 2007 17:36 Send this review to a friend
Fast, accurate, easy to use!  Time owned: 3 to 6 months
I have looked at most every software HF propagation tool that I could lay my hands on over the years. They are either too complex to use at the high end (Voacap), or give less than accurate answers on the low end. SNAPMax, however, has supplied me with reliable, repeatable results -- and the program is a snap (!) to use too. You can apply it to check signal strength, SNR, and MUF, of course; but it also has something that I just love for its simplicity: It can actually tell me, in a single word, as to whether fifteen of my favorite countries or states are actually OPEN or CLOSED to a particular HF frequency and time (I.E.: The software says; "GOOD", "POOR", or "CLOSED" to each desired location!). It can also reliably help with propagation prediction all the way down to the top band; which most other software cannot.
The program is written by the propagation author WA3ZKZ, and is freeware.
Make sure you get the latest version, which is V5.01.
On a quick search of the Web, I have found this program available at the following sites for free download (I do not guarantee or verify these sites in anyway):

http://drn.digitalriver.com/product.php[id]56253[cid]147[SiteID]driverguide
http://www.simtel.net/product.php%5Bid%5D56253%5Bcid%5D147%5BSiteID%5Dsimtel.net

Or just do a quick Google search for 'SNAPmax software propagation download'.
 


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