[Loadstone] Royaltek rbt-2300 (was Dear Monty, Sean et al,)

Shawn Kirkpatrick shawn at odyssey.cm.nu
Wed Jan 2 23:58:26 GMT 2008


Without the nmea log it's hard to say what the problem here would be. It's 
most likely the standard problem of the heading spinning at low speed or 
maybe a bad area for gps signals?

On Wed, 2 Jan 2008, Cearbhall O Meadhra wrote:

> Happy New Year to all on the Loadstone list!
>
> I wonder if anyone from the Loadstone team would like to comment on my query
> sent on 29th of December?
>
> I have just completed a test run using a brand new Royaltek 2300 GPS
> Receiver and Loadstone v.
> 0.69.OS60. I saved the log file and pulled it into a Loadstone formatted
> file combining it with four corner points as I walked at something between
> 2.5 and 3.0 mph around a block. I have added orientation to the Loadstone
> file to show how the Royaltek is reporting the progress.
>
> The result is a dizzying one! It one moment I am progressing along nicely in
> a northeast direction when suddenly I appear to swing Southeast when I know
> that I had not turned but had kept on walking forward.
>
> Could this be due to my walking speed or even to slowing down? Has it
> anything to do with the satellites?
>
> I would really appreciate hearing your views.
>
> I have cut and pasted the logged data below for your information:
>
> table		point
>
> Name	Time	latitude	longitude	Metres	Orientation
> accuracy	satellites	priority	userid	ID
> Start	154431	531993250	-60988200	1	Southwest	1
> 9	0	39208	1198971241
> Meath out  01	154446	531993183	-60988300	1	South
> Southeast	1	9	0	39208	1198971242
> Meath out  02	154501	531993033	-60988233	8	Southeast
> 1	9	0	39208	1198971243
> Meath out  03	154516	531992567	-60987300	17	South
> Southeast	1	9	0	39208	1198971244
> Meath out  04	154531	531991200	-60986150	13	South
> Southeast	1	9	0	39208	1198971245
> Meath out  05	154546	531990083	-60985317	7	East
> Southeast	1	9	0	39208	1198971246
> Meath out  06	154601	531989933	-60984233	4	East	1
> 9	0	39208	1198971247
> Meath out  07	154616	531989933	-60983517	3	East	1
> 9	0	39208	1198971248
> Meath out  08	154631	531989900	-60983017	2	Northwest
> 1	9	0	39208	1198971249
> Meath out  09	154646	531990083	-60983250	2	Northwest
> 1	9	0	39208	1198971250
> conv 46	154701	531990250	-60983583	1	East Northeast	1
> 9	0	39208	1198971251
> conv 01	154716	531990283	-60983383	0	East	1	9
> 0	39208	1198971252
> conv 02	154731	531990283	-60983350	0	West  	1	9
> 0	39208	1198971253
> conv 03	154746	531990283	-60983450	11	Northeast	1
> 9	0	39208	1198971254
> conv 04	154801	531990883	-60982083	14	East Northeast	1
> 9	0	39208	1198971255
> conv 05	154816	531991533	-60980117	12	East	1	9
> 0	39208	1198971256
> conv 06	154831	531991733	-60978300	18	East Northeast	1
> 9	0	39208	1198971257
> conv 07	154846	531992383	-60975700	16	East Northeast	1
> 9	0	39208	1198971258
> conv 08	154901	531993067	-60973433	14	Northeast	1
> 9	0	39208	1198971259
> conv 09	154916	531993833	-60971600	18	East Northeast	1
> 9	0	39208	1198971260
> conv 10	154931	531994517	-60969117	17	Northeast	1
> 9	0	39208	1198971261
> conv 11	154946	531995433	-60967033	12	East Northeast	1
> 9	0	39208	1198971262
> conv 12	155001	531995933	-60965300	9	Northeast	1
> 9	0	39208	1198971263
> conv 13	155016	531996617	-60964500	6	East Northeast	1
> 9	0	39208	1198971264
> strand 51	155031	531996833	-60963650	6	North 	1
> 9	0	39208	1198971265
> Strand 01	155046	531997450	-60963667	11	Northwest
> 1	9	0	39208	1198971266
> Strand 02	155101	531998183	-60964800	3	Northwest
> 1	9	0	39208	1198971267
> Strand 03	155116	531998400	-60965150	11	Southeast
> 1	9	0	39208	1198971268
> Strand 04	155131	531997717	-60963833	8	South
> Southeast	1	9	0	39208	1198971269
> Strand 05	155146	531997033	-60963300	1	East	1
> 9	0	39208	1198971270
> Strand 06	155201	531997033	-60963100	15	West
> Northwest	1	9	0	39208	1198971271
> Strand 07	155216	531997717	-60965050	12	Northwest
> 1	9	0	39208	1198971272
> Strand 08	155231	531998600	-60966133	12	North
> Northwest	1	9	0	39208	1198971273
> Strand 09	155246	531999667	-60966917	20	North
> Northwest	1	9	0	39208	1198971274
> Strand 10	155301	532001350	-60968167	20	North 	1
> 9	0	39208	1198971275
> Strand 11	155316	532003167	-60968783	22	North
> Northwest	1	9	0	39208	1198971276
> Strand 12	155331	532005083	-60969683	6	North
> Northwest	1	9	0	39208	1198971277
> Strand 13	155346	532005583	-60970067	1	North
> Northwest	1	9	0	39208	1198971278
> Strand 14	155401	532005733	-60970150	0	North
> Northwest	1	9	0	39208	1198971279
> Strand 15	155416	532005767	-60970167	2	North 	1
> 9	0	39208	1198971280
> vict 54	155431	532005967	-60970167	1	North 	1	9
> 0	39208	1198971281
> Vict01	155446	532006117	-60970167	0	Southwest	1
> 9	0	39208	1198971282
> Vict02	155501	532006067	-60970283	15	Southwest	1
> 9	0	39208	1198971283
> Vict03	155516	532005233	-60972133	17	West Southwest	1
> 9	0	39208	1198971284
> Vict04	155531	532004400	-60974433	15	Southwest	1
> 9	0	39208	1198971285
> Vict05	155546	532003633	-60976350	14	Southwest	1
> 9	0	39208	1198971286
> Vict06	155601	532002633	-60977833	16	Southwest	1
> 9	0	39208	1198971287
> Vict07	155616	532001800	-60979883	18	West Southwest	1
> 9	0	39208	1198971288
> Vict08	155631	532001183	-60982533	18	West Southwest	1
> 9	0	39208	1198971289
> Vict09	155646	532000317	-60984850	19	Southwest	1
> 9	0	39208	1198971290
> Vict10	155701	531999250	-60987083	16	West Southwest	1
> 9	0	39208	1198971291
> Vict11	155716	531998550	-60989200	1	West Southwest	1
> 9	0	39208	1198971292
> Vict12	155731	531998517	-60989450	1	North 	1	9
> 0	39208	1198971293
> Vict13	155746	531998667	-60989467	0	North Northeast	1
> 9	0	39208	1198971294
> Vict14	155801	531998750	-60989417	8	Southwest	1
> 9	0	39208	1198971295
> Vict15	155816	531998250	-60990467	13	South Southeast	1
> 9	0	39208	1198971296
> v/meath 57	155831	531997150	-60989683	17	South
> Southeast	1	9	0	39208	1198971297
> Ret Meath 01	155846	531995700	-60988700	18	South
> Southeast	1	9	0	39208	1198971298
> Ret Meath 02	155901	531994133	-60987933	7	South	1
> 9	0	39208	1198971299
> Ret Meath 03	155916	531993450	-60987833	1	South
> Southeast	1	9	0	39208	1198971300
> Ret Meath 04	155931	531993300	-60987733	5	North 	1
> 9	0	39208	1198971301
> Ret Meath 05	155946	531993783	-60987700	7	Southwest
> 1	9	0	39208	1198971302
> Ret Meath 06	160001	531993367	-60988667	6	South
> Southwest	1	9	0	39208	1198971303
> Ret Meath 07	160016	531992833	-60989000	3	East
> Southeast	1	9	0	39208	1198971304
> ret-gate 59	160031	531992717	-60988467	6	East
> Southeast	1	9	0	39208	1198971305
> entry 0	160046	531992567	-60987600	8	East Southeast	1
> 9	0	39208	1198971306
> Entry 1	160101	531992233	-60986383	0	Southwest	1
> 9	0	39208	1198971307
> entry 2	160116	531992183	-60986500	7	West  	1	9
> 0	39208	1198971308
> fin door 1600  	160131	531992267	-60987583	8	East	1
> 9	0	39208	1198971309
>
> This starts at my gate and turns South on Meath Road ("meath out" in the
> table)
> Turns down Convent Avenue in an easterly direction ("conv" in the table)
> Back along Strand Road ("Strand" in the table)
> To the left up Victoria Avenue ("Vict" in the table)
> and back down Meath Road ("ret Meath" in the table) to my gate and West to
> the front door.
>
> I only stopped to record the corner points but the log shows that I seem to
> spin around in the middle of the long runs!
>
> All opinions welcome!
>
> All the best,
>
>
> Cearbhall
>
> "Good design enables - Bad design disables"
>
> Tel: 01-2864623 Mob: 087 9922227 Em: cearbhall.omeadhra at projectidd.ie
>
>
>
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> Loadstone at loadstone-gps.com
> http://www.loadstone-gps.com/mailman/listinfo/loadstone
>


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