Re: Re: Slow start to AstronomicalData[]
- To: mathgroup at smc.vnet.net
- Subject: [mg102155] Re: [mg102113] Re: Slow start to AstronomicalData[]
- From: DrMajorBob <btreat1 at austin.rr.com>
- Date: Fri, 31 Jul 2009 05:53:11 -0400 (EDT)
- References: <h4p3n3$j82$1@smc.vnet.net> <200907300929.FAA21378@smc.vnet.net>
- Reply-to: drmajorbob at bigfoot.com
BenT,
This works:
AstronomicalData["Sun", {"Altitude", {2009, 7, 30, 23, 00},
$GeoLocation}, TimeZone -> $TimeZone]
-28.27349
In your working code, {23,00} is taken to be a geopraphic location, not
the 11:00 PM you intended it to be.
AstronomicalData["Sun", {"Altitude", {2009, 7, 30}, {23, 00}}, TimeZone ->
$TimeZone]
Bobby
On Thu, 30 Jul 2009 04:29:17 -0500, BenT <brtubb at pdmusic.org> wrote:
> After the database collection is loaded and indexed (i.e. downloaded),
> further access to the data such be automatic. I've confirmed that on
> my on PC which is similarly configured as yours
>
> In[106]:= $Version
> DateString[]
> $TimeZone
>
> Out[106]= "7.0 for Microsoft Windows (32-bit) (January 30, 2009)"
>
> Out[107]= "Wed 29 Jul 2009 15:04:09"
>
> Out[108]= -5.
>
> In[116]:= AstronomicalData["Sun", {"Altitude", {2009, 7, 30}, {23,
> 00}}, TimeZone -> $TimeZone]
>
> Out[116]= -7.34052
>
> However when I tried to apply the {latitude, longitude} pararmeters
> which can be obtained from the globle variable $GetLocation (in Fort
> Walton Beach, FL), I got the following output with errors:
>
> In[117]:= AstronomicalData["Sun", {"Altitude", {2009, 7, 30}, {23,
> 00}, {$GeoLocation}}, TimeZone -> $TimeZone]
>
> During evaluation of In[117]:= AstronomicalData::notprop: {"Altitude",
> {2009, 7, 30}, {23, 0}, {{30.830000000000002, -85.74}}} is not a known
> property for AstronomicalData. Use AstronomicalData["Properties"] for
> a list of properties. >>
>
> Out[117]= AstronomicalData["Sun", {"Altitude", {2009, 7, 30}, {23,
> 0}, {{30.83, -85.74}}}, TimeZone -> -5.]
>
> BTW, for convenience I suggest you devote a notebook for reference
> with the output of these commands:
>
> [define this as a Section [Alt-4]]
> $Version
> DateString[]
> $TimeZone
> $GeoLocation
> ?AstronomicalData
>
> [define this as a Section [Alt-4]]
> AstronomicalData[] // ColumnForm
>
> [define this as a Section [Alt-4]]
> AstronomicalData["Properties"] // ColumnForm
>
> [define this as a Section [Alt-4]]
> {* Applications *)
>
> Ben
>
> On Jul 29, 4:10 am, Chonny <jcon... at aerodyne.com> wrote:
>> Hi,
>>
>> Under Mathematica 7.0.1 I'm using:
>>
>> AstronomicalData[ "Sun", {"Altitude", datetime, {lat, long}},
>> TimeZone -> 0 ];
>>
>> to get the Sun's Az and El. Works fine, but it takes about 50 seconds
>> for "Loading Astronomical Indices...". This is presumably because
>> there is so much data in the database.
>>
>> Any ideas on how this could be sped up??
>>
>> System is WinXP Pro SP2 on a 3.2 GHz Xeon with 1.5 Gb of RAM. Thanks.
>>
>> Chonny
>
>
--
DrMajorBob at bigfoot.com
- References:
- Re: Slow start to AstronomicalData[]
- From: BenT <brtubb@pdmusic.org>
- Re: Slow start to AstronomicalData[]