SIRGAS-CON-D and Local Processing Centers, a solution for the
Transcript of SIRGAS-CON-D and Local Processing Centers, a solution for the
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SIRGAS-CON-D and Local Processing Centers, a solution for the densification of the Reference Frame in Latin America and the Caribbean.
M. V. Mackern (1, 3); M. L. Mateo (1, 2); A. V. Calori (1, 2) and A. M. Robin (2)
(1) Universidad Nacional de Cuyo(2) Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales,
CONICET(3) Universidad Juan A. Maza,
IAG2009 Bs As., September 2009
Mendoza, Argentina
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This contribution reports:
1. Motivation2. An introduction about the Densification Network and the
structure of the processing centers.3. Methodology used by the processing centers.4. First results about the last three years, from CIMA Regional PC.
5. Conclusions.
Content
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1. The continuously increasing of SIRGAS regional station number.
2. The incorporation to SIRGAS of new processing centers in Latin American institutions. An excellent opportunity to distribute the hard work.
1-Motivation
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New regional stations
4 + 2E + 3ExperimentalECU - LUZ - URY
1+3+2 ExperimentalIBGE - IGAC - CIMA - INEG - GMA
1 + 5 ExperimentalDGFI
New Processing Centers
July 2009
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IGSRegionalTotal
Increase of SIRGAS stations 1995 - 2009
Users' community
Countries Countries Countries Countries ---- RegionsRegionsRegionsRegions
Geodetic Community
IGSIGSIGSIGSSIRGAS
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continuous continuous continuous continuous stationsstationsstationsstations
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After week 1495TODAY
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IGS-RNACC-SIR
SIRGAS-CON. Structure of processing
before week 1495 (August 31, 2008)
DGFI official AC4 Experimental AC
INEGIGAC
IBGE CIMA
IGS-RNAAC-SIR
DGFI
It was established a new
ESTRUCTURE
+ 45 new Stations
In the last 5 yearsEXPERIMENTAL STAGE
(Quality and punctuality)
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1) SIRGAS-CON-Regional Network a contributions to the IGS• Loosely constrained weekly solutions of the densification and core networks.• Combinations calculated by IGS-RNACC-SIR at DGFI and are controlled by IBGE.
2) SIRGAS-CON-Regional Network as a densification o f IGS05 in American countries.•Loosely constrained weekly solutions from each SIRGAS densification network (including new station) are computed.•Weekly solutions are aligned to IGS05. The strategy used is: �constraining reference coordinates (W=1/(±1E-05))�Fiduciales points: IGS05 stations with IGS weekly coordinates
Requirements:• Punctuality and Precision.•Consistency with the IGS global network.
3. FIRST RESULTS
CIMASIRGAS-CON-D-South
3- Methodology
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"Delayintheloadi ngofCPLweeklyr esults"
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CIMAExperimental Processing Centre
4-First results. CIMA (Regional Processing Centre)Punctuality on delivering weekly solutions
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rms (N) rms (E) rms (Up)
rms (m
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Repeatability in CIMA weekly loosely constrained solutions [mm]
1) Evaluation of the daily coordinate repeatabilityMean values of RMS for daily coordinate repeatability in the CIMA loosely constrained weekly solutions.
Precision: Quality control
2) Evaluation of the loosely constrained weekly soluti ons with respect to:DGFI (36 Common stations)IBGE (21 Common stations)URY (31 Common stations)
Mean values of RMS after Helmert transformation between two groups of coordinates CIMA - DGFICIMA - IBGE andCIMA - URY
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5.2 mm
4-First results. CIMA (Regional Processing Centre)-QUALITY
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CIMA and IBGEOfficial Processing Centre
Quality control
CIMA-DGFI
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CIMA and IBGEExperimental Processing Centre
Agreement between the loosely constrained solutions calculated by CIMA, DGFI, IBGE and URY
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BRAZ has a Strong seasonal variation. Not Used as Fiducial point
ADJUSTMENT ---- Reference FrameReference Frame
Consistency with the IGS global networkAlignment of the weekly solution to the IGS05 Strategy: constraining reference coordinates (weight= 1/ ±1e-05)Fiduciales points: IGS weekly coordinates from IGS05 stations (igsPwwww.snx).CHPI, CONZ, GLPS, ISPA, LPGS, SANT, SCUB, UNSAControl pointsControl points:AREQ, BOGT,BRAZ, CFAG,COPO, CRO1, IQQE, KOUR, MANA, OHI2, PALM Y RIO2 . They appear in IGS weekly solutions.
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Control point: Coordinate agreement SIRGAS-CON-D-South (CIMA) wrt IGS weekly solutions
RMS of the differences between the weekly coordinates of the IGS and the coordinates obtained in the weekly solutions aligned with IGS weekly calculated by CIMA. Analyzed period: 147 weeks (10/2006 to 8/2009)
* OHI2, CRO1, PALM and RIO2 Edges of the networkDeformation is larger
*IQQE has a short period
Mean rms x = 3.5 mmMean rms y = 4.7 mmMean rms z = 2.9 mm
Average value= 3.7 mm
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� The continuously increasing number of SIRGAS-CON stations creates the need to divide the network in several sub-networks that are individually processed and then combined in a consistent solution.
� For that purpose it was necessary to establish new processing and combination centers with the involvement of Latin American institutions.
� Five experimental processing center (INEGI, IGAC, IBGE, IGM-A and CIMA) and two combination centers (DGFI and IBGE) were established.
� After one year period of training and validation, three experimental centers (IGAC, IBGE and CIMA) and both combination centers (DGFIand IBGE) became official after demonstrate high quality, punctuality and continuity standards.
� Five experimental centers are now in process of being validated.
� Thanks to this capacity building process, in the near future every SIRGAS country will have an in-house processing centre.
Concluding remarks
SIRGAS-CON-D and Local Processing Centres, a soluti on from the densification of the Reference Frame in Latin America and the Car ibbean.
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CIMA CIMA Centre of processing Centre of processing IngenierIngenierííaa--MendozaMendoza--ArgentinaArgentina
Muchas gracias !!!Muchas gracias !!!
Thank you for your attention!!Thank you for your attention!!