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Old 11-12-2007, 03:46 PM   #4
Ted Craven
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Join Date: Jun 2005
Location: Nanaimo, British Columbia, Canada
Posts: 9,256
Robert,

For clarity, TrackMaster does not supply adjusted call times - those are calculated solely by the software (RDSS, Spec, Val).

If you compare times on the RDSS Original screens to BRIS or DRF or whomever, sourced from Equibase, the call times should be identical except if you are viewing them in 5ths or 10ths. A final time on a Result Chart of 1:09.74 (74/100ths) would be expressed as 1:09.7 (7/10th) by RDSS and 1:09.3 (3/5ths) by BRIS or DRF in 5ths mode. Rhetorical question: which do think is a more accurate representation of the 1:09.74 Result Chart time: 1:09.7 or 1:09.6 (which is 3/5ths)?

After that point, if you are trying to understand how later Sartin software modifies raw call times to Adjusted times, this has been discussed in detail in several posts here and you could use the new Google site search to help dig up more references. But here's the summary (and an interesting learning exercise for you):

Raw call times become Adjusted call times after the following adjustments:

1. Distance equalization
2. Daily Track Variant
3. Inter Track Variant

Find a 6f paceline in a 6f race today, with DTV = 0, from today's track. This mitigates the first 2 adjustments above. All differences between Original call times and adjusted call times will be due to ITV. (There will be an ITV adjustment even if the line was run at today's track). DTV = 0 means the final time was par for that track, surface and distance (neither faster nor slower).

Now find a line, same distance, same track but with DTV = -5 (5 units FASTER than par). You know from the previous step what the ITV adjustment was between Original and Adjusted. Now, by comparing a FAST DTV, you know that the additional adjustment at each call point was due to the additional application of the DTV adjustment. Try the same thing with DTV = +5 (5 units SLOWER than par), then +10, then -10, etc. Now you know how DTV is added.

Then find a 6.5 line in today's 6f race, same track. Since you know how ITV and DTV are done, any new differences between Original and Adjusted are due to distance equalization.

Etc, etc.

Now you know how RDSS (not TrackMaster) adjusts Original to Adjusted call times. All velocities are based on Adjusted times and beaten lengths. All compound factors are based on (adjusted) velocities. Etc, etc.

If you really want to have confidence in how RDSS makes its numbers starting with what is published in Result Charts, try that exercise. Presuming that does give you confidence (and a headache), then just sit back and let the software do what it does best (number crunching) and you do what you do best: analysis, wager selection, feedback from result to original analysis (learning), share your success!



Ted
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