Guest guest Posted January 15, 2004 Report Share Posted January 15, 2004 Juan, I mentioned the degree.decimal notation to let anyone know that data taken from any of the seismicity lists on the USGS or NEIC websites had coordinates listed that format instead of degree, minute, second. I certainly wasn't recommending that anyone switch. Although it would be nice if Solar Fire had the option to use either degree.decimal or d.m.s entry -- save the trouble of having to convert. According to the USGS data, the epicenter of the Gujarat quake was not in Bhuj, but was at 23.41N 70.23E. If you look around the USGS site, you can find a Word formatted doc of strong earthquakes from 1556 to present, most with times (in UT) and coordinates. CCRS is still a DOS program, so it should work in a DOS window. While I use Solar Fire for its versatility, I still _trust_ the calculations from CCRS for accuracy. Solar Fire 5 does allow for calculation of Prime Vertical longitudes, angular crossing times, but you have to construct your own " page " to do it. You can also get a table of " co-risings " , etc., the zodiacal longitudes with which a planet bodily rises, culminates, sets, anti- culminates; again in a separate " page " . If you have SF5, I can send you files to do that. I don't know if they would work with SF4. Re: Geographic vs Geocentric latitude I switched back and forth between the two years ago, finally staying with geographic latitude after a discussion with Gary Duncan, but don't ask me now what convinced me to change. Gary knew a hell of a lot more about celestial mechanics than I ever did. Sidereally yours, Matthew Quote Link to comment Share on other sites More sharing options...
Guest guest Posted January 16, 2004 Report Share Posted January 16, 2004 --- mquellas <mquellas wrote: > Juan, > > I mentioned the degree.decimal notation to let > anyone know that data > taken from any of the seismicity lists on the USGS > or NEIC websites > had coordinates listed that format instead of > degree, minute, second. > I certainly wasn't recommending that anyone switch. > Although it would > be nice if Solar Fire had the option to use either > degree.decimal or > d.m.s entry -- save the trouble of having to > convert. > > According to the USGS data, the epicenter of the > Gujarat quake was > not in Bhuj, but was at 23.41N 70.23E. As for the Quake.. most of the loss of life was in and near Bhuj. Coordinates can be for the epicenter or where most lives were affected. My data was acquired at the time of the catastrophe and I relied on Indian Government information. I presume that the coordinates you offer are decimal? How is someone to know which system you are using? By having E,W,S or N at the end of your numbered information. I think you create confusion by not providing coordinates in dms. If you are giving me decimal data how am I to change that to dms for input into my software? 41 over 100 = x over 60... x = ? If you look > around the USGS > site, you can find a Word formatted doc of strong > earthquakes from > 1556 to present, most with times (in UT) and > coordinates. > > CCRS is still a DOS program, so it should work in a > DOS window. While > I use Solar Fire for its versatility, I still > _trust_ the > calculations from CCRS for accuracy. > I've got a pirated copy of CCRS but don't know how to open it... If you have a suggestion I would appreciate it... > Solar Fire 5 does allow for calculation of Prime > Vertical longitudes, > angular crossing times, but you have to construct > your own " page " to > do it. You can also get a table of " co-risings " , > etc., the zodiacal > longitudes with which a planet bodily rises, > culminates, sets, anti- > culminates; again in a separate " page " . If you have > SF5, I can send > you files to do that. I don't know if they would > work with SF4. > That would be terrific... I've got SF5... I've got Winstar that will do the PV and Mundoscope but I hate jumping around utilizing softwares... I would appreciate the files very much... > Re: Geographic vs Geocentric latitude > I switched back and forth between the two years ago, > finally staying > with geographic latitude after a discussion with > Gary Duncan, but > don't ask me now what convinced me to change. Gary > knew a hell of a > lot more about celestial mechanics than I ever did. > I went through a similar experience myself... I didn't see the value to change... > > > Sidereally yours, > Matthew > Regards, Juan PS: What part of the country are you living in? Quote Link to comment Share on other sites More sharing options...
Guest guest Posted January 16, 2004 Report Share Posted January 16, 2004 On Friday, January 16, 2004 3:09 AM , Juan Oliver wrote: > > I presume that the coordinates you offer are decimal? > > How is someone to know which system you are using? > By having E,W,S or N at the end of your numbered > information. I think you create confusion by not > providing coordinates in dms. I agree - (see, we do agree on some things, Juan!) > If you are giving me decimal data how am I to change > that to dms for input into my software? > 41 over 100 = x over 60... x = ? take the decimal bit, and multiply by 60: So for 23.41N: 0.41*60 = 24.6. If you only work to the nearest minute, that would be 25 minutes (rounding up). If you work to the nearest second, do the same with the " 0.6 " bit of the 24.6 minutes: 0.6*60 = 36 So, 23.41N is 23d24m36s If you use Windows on a PC, here's an easy way to do it: 1. Go into " Calculator " (on the Accessories menu). Click on " View " then " Scientific " to get a full scientific calculator. 2. Enter the decimal value - eg 23.41 in the box, then click " dms " 3. The display then says 23.2436 - looks confusing, but means 23d24m36s The display *is* confusing: for instance, if you enter 23.5 and press dms, it displays " 23.3 " . Read this as " 23.3000 " , or 23d30m00s (the fact that it leaves off the trailing zeroes is a pain - because it's not instantly obvious that the " .3 " means 30 instead of just 3 -that would be " .03 " ) To do it in reverse, eg to convert 51d27m18s North into decimal, enter " 51.2718 " , click the " Inv " box ( " inverse " ) and then dms and it displays 51.455 Quote Link to comment Share on other sites More sharing options...
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