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Modeling Improvements in the ILRS Reprocessing for ITRF2013 E. C. Pavlis 1 , V. Luceri 2 , M. KuzmiczCieslak 1 , D. König 1 and G. Bianco 2 1 GEST/UMBC, BalOmore, MD, USA 2 ASI/CGS, Matera, Italy 19th Interna+onal Workshop on Laser Ranging Celebra+ng 50 Years of SLR: Remembering the Past and Planning for the Future October 2731, 2014 Annapolis, MD , USA
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Page 1: Modeling)Improvements)in)the)ILRS) Reprocessing)for)ITRF2013)) · 7824 San Fernando 100 CSPAD No CNTL s->m 2.5 30 25 252-246 249 7825 Stromlo 10 CSPAD CNTLD s->m 2.5 4 10 257-247

Modeling  Improvements  in  the  ILRS  Reprocessing  for  ITRF2013    

E.  C.  Pavlis1,  V.  Luceri2,  M.  Kuzmicz-­‐Cieslak1,  D.  König1  and  G.  Bianco2    1GEST/UMBC,  BalOmore,  MD,  USA  

2ASI/CGS,  Matera,  Italy        

19th  Interna+onal  Workshop  on  Laser  Ranging  Celebra+ng  50  Years  of  SLR:  Remembering  the  Past  and  Planning  for  the  Future  

October  27-­‐31,  2014  Annapolis,  MD  ,  USA  

Page 2: Modeling)Improvements)in)the)ILRS) Reprocessing)for)ITRF2013)) · 7824 San Fernando 100 CSPAD No CNTL s->m 2.5 30 25 252-246 249 7825 Stromlo 10 CSPAD CNTLD s->m 2.5 4 10 257-247

Outline  

•  ITRF2013  reanalysis  schedule  

•  Improved  models  implementaOon  

–  New  gravity  modeling  

–  Target  array  CoM  offset  correcOon  model  

–  Modified  Mean  Pole  model  of  IERS  MP  series  

•  SLR  network  changes:    –  new  sites,  earthquakes  near  old  sites  à  new  coordinates  &  velociOes  

•  StaOon  data  quality  monitoring  &  systemaOc  error  modeling  

•  ITRF2013  reanalysis  delivery  to  ITRS/IGN:  October  24,  2014  

2  Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA  

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ILRS  Reanalysis  Schedule  

•  First  planning  meeOng  of  the  ILRS  AWG  held  in  Potsdam,  Germany,  September  2013    

•  Agreed  to  implement  and  validate  several  new  models  before  the  reanalysis  

•  Considerable  Ome  and  effort  required  from  each  AC  /  CC  for  the  implementaOon  of  the  models  

•  The  reanalysis  covers  the  period  1983  (as  with  ITRF2008),  up  to  the  end  of  2013.  

3  Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA  

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Model  Improvement  Areas  

•  Update  of  the    a  priori    TRF  (SLRF2008)  to  include  new  sites  and  beber  posiOon/velocity  esOmates  for  tectonically  acOve  regions  

•  New  Ome-­‐dependent  target  signature  model  for  LAGEOS  and  ETALON  satellites  (“COM  offset”)  

 

•  New  staOc  gravitaOonal  model  and  temporal  variaOons  for  the  2nd  degree/order  terms  

 

•  Improved  version  of  the  IERS  Mean  Pole  descripOon  (avoiding  the  fixed  polynomial  in  the  2010  ConvenOons)  

•  Improved  systemaOc  error  handling,  extended  to  all  sites  and  all  of  the  period  covered  by  the  data  

4  Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA  

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A  priori  TRF  (SLRF2008)  

 

•  A  final  version  of  SLRF2008  (ILRS  version/extension  of  ITRF2008)  is  used  as  the  starOng  posiOons  and  velociOes  of  our  tracking  sites  for  the  re-­‐analysis  

 

–  ASI,  DGFI  and  JCET  developed,  evaluated  and  validated  tailored  staOon  soluOons  for  about  a  dozen  sites:  

•   some  that  suffered  major  earthquakes  and,  

•   some  that  joined  the  network  aher  the  development  of  ITRF2008  and  are  not  present  in  it.  

5  Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA  

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StaOon  with  Updated  PosiOons  in  SLRF2008  

STATION   SLRF2008   ASI  Solu+on   DGFI  Solu+on  Altay   1879   X      Arkhyz   1886   X  Baikonur   1887   X  Svetloe   1888   X  Zelenchukskaya   1889   X  Badary   1890   X  Koganei   7308   X  Tanegashima   7358   X  Concepcion   7405   X  San  Juan   7406   X  Kunming   7820   X  Shanghai   7821   X  Simosato   7838   X  

Erricos  C.  Pavlis      10/28/2014   6  19th  ILW  2014,  Annapolis,  MD,  USA  

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Target  Signature  Modeling  

•  In  2013  ILRS  adopted  a  new  model  to  account  for  the  opOcal  response  of  each  target  to  different  systems  and  modes  of  operaOon:  the  so-­‐called  “CoM  offset”  

–  It  depends  on:  •  The  geometric/opOcal  properOes  of  the  tracked  s/c  LRA  •  The  ranging  system  installed  at  each  site,    •  The  raw  data  preprocessing  scheme,  and  •  The  mode  of  operaOon  of  the  system  (single/few/mulO  photon)    

•  The  applicaOon  of  the  “CoM”  correcOon  is  now  +me-­‐dependent  and  applied  by  s/w  using  look-­‐up  tables  that  need  frequent  updates  for  new  sites,  etc.  

7  Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA  

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Pre-­‐2013  Center  of  Mass  Offset  CorrecOon  (Fixed)  

8  Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA  

Stn pad ID

Name Pulse length

(ps) Detector

Regime (single, few,

multi)

Editing Level (σ)

Calib. St.

error (mm)

LAGEOS St. error

(mm)

LAGEOS CoM range

(mm)

LAGEOS CoM

ADOPTED (mm)

1873 Simeiz 350 PMT No CNTL 2.0 60 70 248-244 246 1879 Altay 150 PMT No CNTL 2.5 20 36 254-248 251 1884 Riga 130 PMT CNTLD s->m 2.0 10 15 252-248 250 7080 McDonald 200 MCP CNTLD s->m 3.0 8.5 13 250-248 249 7090 Yaragadee 200 MCP CNTLD f->m 3.0 4.5 10 250-248 249 7105 Greenbelt 200 MCP CNTLD f->m 3.0 5 10 250-248 249 7110 Mon. Peak 200 MCP CNTLD f->m 3.0 5 10 250-248 249 7119 Haleakala 200 MCP CNTLD f->m 3 4.5 10 250-248 249 7124 Tahiti 200 MCP CNTLD f->m 3.0 6 10 250-248 249 7237 Changchung 200 CSPAD CNTLD s->m 2.5 10 15 250-245 248 7249 Beijing 200 CSPAD No CNTL, m 2.5 8 15 255-247 251 7355 Urumqui 30 CSPAD No CNTL 2.5 15 30 255-247 251 7358 Tanegashima 50 MCP No CNTL 3 1.3 5 252-248 250 7405 Concepcion 40 CSPAD CNTLD s 2.5 15 20 246-247 246 7406 San Juan 40 CSPAD No CNTL 2.5 8 15 246-255 250 7501 Harteb. 200 PMT CNTLD f->m 3.0 5 10 250-244 247 7806 Metsahovi 50 PMT ? 2.5 15 17 254-248 251 7810 Zimmerwald 60 CSPAD CNTLD s->f 2.5 5 12 246-249 248 7811 Borowiec 40 PMT No CNTL f 2.5 16 23 256-250 253 7824 San Fernando 100 CSPAD No CNTL s->m 2.5 30 25 252-246 249 7825 Stromlo 10 CSPAD CNTLD s->m 2.5 4 10 257-247 252 7832 Riyadh 100 CSPAD CNTLD s->m 2.5 10 15 252-246 249 7835 Grasse 50 CSPAD CNTLD s->m 2.5 6 15 255-246 250 7836 Potsdam 35 PMT CNTLD s->m 2.5 10 20 256-252 254 7838 Simosato 100 MCP CNTLD s->m 3.0 20 40 252-248 250 7839 Graz 35 CSPAD No CNTL m 2.2 3 9 255-250 252 7839 Graz kHz 10 CSPAD No CNTL s->f 2.2 3 9 255-250? 252 7840 Herstmonceux 100 CSPAD CNTLD s 3.0 6 15 246-244 245 7840 Hx kHz 10 CSPAD CNTLD s -1.5,+2.5 3 9 245 245 7841 Potsdam 3 50 PMT CNTLD s->f 2.5 10 18 254-248 251 7941 Matera 40 MCP CNTLD m 3.0 1 5 252-248 250 8834 Wettzell 80 MCP No CNTL f->m 2.5 10 20 252-248 250

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Improvements  due  to  the  new  Satellite  CoM  Model  

2004 2006 2008 2010 2012 2014-60

-40

-20

0

20

40

60

[mm

]

Potsdam 7841

ITRF2008 (ilrsa)ITRF2013 (asi)

Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   9  

“Bias”  

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GravitaOonal  Modeling  

•  New  staOc  gravitaOonal  model  adopted  by  all  ACs:    –  GGM05S  from  the  GRACE  project  

•  A  consistent  set  of  addiOonal  terms  with  significant  temporal  variaOon,  derived  from  SLR  tracking  of  mulOple  geodeOc  satellites  by  Minkang  Cheng  (CSR/UT),  using  GGM05S  as  the  background  staOc  part  and  using  the  same  standards  :  

 

–  C(2,0)  &  C/S(2,1)  from  CSR's  15d  series,  interpolated/evaluated  at  mid-­‐arc  epoch  of  our  15d  arcs  (1983  -­‐  1992)  and  our  7d  arcs  (1993  –  2013)  

 

–  The  nominal  zonal  terms'  values  for  degree  3-­‐6  for  our  use  come  from  CSR's  GGM05S,  their  linear  rates  however  come  from  Cheng  et  al.,  1997  

10  Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA  

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Earth  Oblateness  VariaOons  

Offset  from  GGM05S  

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C(2,0)  Time  Series  

Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   12  

1993.0  1983.0  

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C(2,0)  InterpolaOon  15d  &  7d  arcs  

Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   13  

C(2,0)  

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C/S(2,1)  InterpolaOon  15d  &  7d  arcs  

Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   14  

C(2,1)    

S(2,1)    

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Mean  Pole  Model  

 

•  The  IERS  ConvenOons  have  a  Mean  Pole  model  in  the  form  of  a  polynomial  that  was  fit  to  one  release  of  the  official  IERS  Mean  Pole  (MP)  series  (ca.  2010)  

•  Changes  (ca.  2005)  in  the  nearly  linear  MP  moOon  require  that  we  are  flexible  and  adapt  the  “model”  to  such  changes,  since  extrapolaOon  from  a  fixed  polynomial  fit  is  inadequate  

•  A  daily  series  of  the  MP  coordinates  and  their  rates  based  on  the  interpolated/extrapolated  IERS  MP  series  was  adopted,  instead  of  the  fixed  polynomial  version  in  the  IERS  2010  ConvenOons  

15  Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA  

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                     Rapid  ice  melOng  drives  Earth's  pole  to  the  east    

J.  L.  Chen1,  C.  R.  Wilson1,2,  J.  C.  Ries1,  B.  D.  Tapley1  DOI:  10.1002/grl.50552  

Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   16  

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Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   17  

RealisOc  Mean  Pole  Model  (IERS  EOP  Series)  

Mean  Pole  Differences:  IERS  Series  2010  vs  2014  

From  Daniel  Gambis  

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StaOon  SystemaOc  Error  Modeling    

•  The  ILRS  iniOated  a  thorough  invesOgaOon  of  the  staOon-­‐dependent  systemaOc  errors  since  the  development  of  ITRF2008,  leading  to  significant  improvement  and  consistency  of  the  product  we  deliver  to  ITRS  

•  Since  several  years  we  maintain  a  Ome  series  of  weekly-­‐averaged  systemaOc  error  esOmates  for  all  acOve  sites  (since  1993),  which  is  used  to  noOfy  staOons  of  sudden  changes  with  respect  to  the  adopted  reference  frame  

•  StarOng  late  last  year,  the  ILRS  replaced  the  outdate  way  the  staOons  reported  changes  to  the  community  with  a  more  efficient  and  simple  way,  readily  accessible  to  users:  the  StaOon  History  Change  records  (archived  at  the  DCs)  

18  Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA  

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Zimmerwald Systematics

Riga event timer

Lageos-1 Bias start Swapped counters

Bias stop CSPAD

Lageos-2

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Bias to be estimated 7810 --- mm B 00:000:00000 00:000:00000 Infrared only Biases to be applied 7810 --- mm B 88:145:00000 89:273:00000 R 50.00 7810 --- mm B 98:001:00000 02:149:00000 R -26.00 7810 --- mm B 02:149:00000 03:070:00000 R -15.00 ILRS/AWG 09/05/06 7810 --- mm B 03:070:00000 04:363:00000 R -22.00 ILRS/AWG 09/05/06 7810 --- mm B 04:363:00000 06:037:00000 R -26.00

Zimmerwald Systematics

After correction

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Herstmonceux Systematics

UPDATE for ITRF2013

In red the bias applied in the analysis for ITRF2008

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Routine Systematics Estimation

 AcOve  staOons  requiring  esOmaOon  of  a  correcOon:      1864  -­‐-­‐-­‐  mm      A  00:000:00000  00:000:00000                                                1868  -­‐-­‐-­‐  mm      A  00:000:00000  00:000:00000                                                  7249  -­‐-­‐-­‐  mm      A  12:067:00000  00:000:00000                                                  7308  -­‐-­‐-­‐  mm      A  00:000:00000  00:000:00000                                                  7403  -­‐-­‐-­‐  mm      A  10:265:00000  00:000:00000      7820  -­‐-­‐-­‐  mm      A  12:001:00000  00:000:00000        7821  -­‐-­‐-­‐  mm      A  09:148:00000  10:069:00000        8834  -­‐-­‐-­‐  mm      A  10:319:00000  00:000:00000      

2002 2004 2006 2008 2010 2012 2014-0.04

-0.02

0

0.02

0.04

0.06Station: Wettzell 8834; Satellite: Lageos-1;

Year

met

ers

2002 2004 2006 2008 2010 2012 2014

-0.2

-0.1

0

0.1

0.2

Station: Bejing 7249; Satellite: Lageos-2;

Year

met

ers

2002 2004 2006 2008 2010 2012 2014-0.05

0

0.05

0.1Station: Wettzell 8834; Satellite: Lageos-2;

Year

met

ers

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Unrecoverable Errors

Wettzell

Simeiz

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Zoom From Jan 3, 2009 To Oct 5, 2014

DATE

BIAS [mm

]Graz 7839 LAGEOS2

Jan '10 Jan '12 Jan '14Jan '09 Jan '11 Jan '13Jul '09 Jul '10 Jul '11 Jul '12 Jul '13 Jul '14

1995 2000 2005 2010

-100

0

-75

-50

-25

25

50

75

1w 1m 6m 1y 2y 3y All

Highcharts.com

Data Handling File Discontinuities File SCH SCI

Tracking  of  System  ConfiguraOon  Changes  

Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   24  

hbp://geodesy.jcet.umbc.edu/ILRS_AWG_MONITORING/  

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Zoom From Dec 27, 2008 To Oct 5, 2014

DATE

BIAS [mm

]Graz 7839 LAGEOS

Jan '12 Jan '14Jul '10 Jan '11 Jul '11 Jul '12 Jan '13 Jul '13 Jul '14Jan '10Jul '09Jan '09

1995 2000 2005 2010

-100

0

-75

-50

-25

25

50

75

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Highcharts.com

Data Handling File Discontinuities File SCH SCI

Tracking  of  System  ConfiguraOon  Changes  

Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   25  

hbp://geodesy.jcet.umbc.edu/ILRS_AWG_MONITORING/  

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Tracking  of  System  ConfiguraOon  Changes  

Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   26  

hbp://geodesy.jcet.umbc.edu/ILRS_AWG_MONITORING/  

Zoom From Jun 30, 2011 To Dec 25, 2013

DATE

BIAS [mm]

Potsdam 7841 LAGEOS

Jan '12 Jan '13Jul '11 Oct '11 Apr '12 Jul '12 Oct '12 Apr '13 Jul '13 Oct '13

2006 2008 2010 2012 2014

-100

0

-75

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75

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Data Handling File Discontinuities File SCH SCI

Zoom From Feb 29, 2004 To Jul 5, 2010

DATE

BIAS [mm]

Potsdam 7841 LAGEOS

Jan '10Jan '09Jan '05 Jan '06 Jan '07 Jan '08Jul '04 Jul '05 Jul '06 Jul '07 Jul '08 Jul '09 Jul '10

2006 2008 2010 2012 2014

-100

0

-75

-50

-25

25

50

75

1w 1m 6m 1y 2y 3y All

Highcharts.com

Data Handling File Discontinuities File SCH SCI

Zoom From Jan 3, 2014 To Oct 5, 2014

DATE

BIAS [mm]

Potsdam 7841 LAGEOS

Jan '14 Jul '14Mar '14 May '14 Sep '14Feb '14 Apr '14 Jun '14 Aug '14 Oct '14

2006 2008 2010 2012 2014

-100

0

-75

-50

-25

25

50

75

1w 1m 6m 1y 2y 3y All

Highcharts.com

Data Handling File Discontinuities File SCH SCI

4  mm  

9  mm  

2  mm  

hbp://geodesy.jcet.umbc.edu/ILRS_AWG_MONITORING/  

Page 27: Modeling)Improvements)in)the)ILRS) Reprocessing)for)ITRF2013)) · 7824 San Fernando 100 CSPAD No CNTL s->m 2.5 30 25 252-246 249 7825 Stromlo 10 CSPAD CNTLD s->m 2.5 4 10 257-247

Tracking  of  System  ConfiguraOon  Changes  

Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   27  

hbp://geodesy.jcet.umbc.edu/ILRS_AWG_MONITORING/  

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Current  Results  for  1993-­‐2013    

•  The  ILRS  generates  a  single  combined  product  for  the  ITRS  and  a  back-­‐up  combinaOon  as  an  internal  check  

•  The  back-­‐up  combinaOon  product  is  generated  using  independent  s/w  and  a  different  approach,  based  on  the  deconstrained  normal  equaOons  and  a  variance  component  esOmaOon  for  the  relaOve  weight  esOmaOon  between  the  individual  AC  contribuOons  

•  The  two  series  that  cover  the  main  period  1993-­‐2013  indicate  an  agreement  below  their  formal  error  esOmates  

•  The  result  of  the  implemented  improvements  is  beber  seen  when  comparing  the  Ome  series  from  individual  ACs  

28  Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA  

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SLR  TRF  Origin:  Z-­‐Component  wrt  SLRF2008  

TX Origin Offset [mm] ORIGIN OFFSETS wrt SLRF2008 AC(asi)

CC(ilrsa) v60n

TY Origin Offset [mm]ORIGIN OFFSETS wrt SLRF2008 AC(asi)

CC(ilrsa) v60n

TZ Origin Offset [mm] ORIGIN OFFSETS wrt SLRF2008 AC(asi)

CC(ilrsa) v60n

Mean/Std. Dev.: 0.94 ± 4.14 Count:1089 Mean/Std. Dev.: 1.03 ± 3.94 Count:1091 Mean/Std. Dev.: -0.32 ± 7.49 Count:1086

Zoom From Jan 4, 1993 To Dec 28, 2013

DATE

Tz Origin Offset [mm]

ORIGIN OFFSETS wrt SLRF2008 AC(asi) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-60

-40

-20

0

20

40

3d 1w 1m 6m 1y All

Highcharts.com

Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   29  

TX Origin Offset [mm] ORIGIN OFFSETS wrt SLRF2008 AC(dgfi)

CC(ilrsa) v60n

TY Origin Offset [mm]ORIGIN OFFSETS wrt SLRF2008 AC(dgfi)

CC(ilrsa) v60n

TZ Origin Offset [mm] ORIGIN OFFSETS wrt SLRF2008 AC(dgfi)

CC(ilrsa) v60n

Mean/Std. Dev.: -2.99 ± 5.62 Count:1084 Mean/Std. Dev.: -1.11 ± 5.41 Count:1090 Mean/Std. Dev.: 2.20 ± 10.58 Count:1087

Zoom From Jan 4, 1993 To Dec 28, 2013

DATE

Tz Origin Offset [mm]

ORIGIN OFFSETS wrt SLRF2008 AC(dgfi) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-60

-40

-20

0

20

40

3d 1w 1m 6m 1y All

Highcharts.com

TX Origin Offset [mm] ORIGIN OFFSETS wrt SLRF2008 AC(grgs)

CC(ilrsa) v60n

TY Origin Offset [mm]ORIGIN OFFSETS wrt SLRF2008 AC(grgs)

CC(ilrsa) v60n

TZ Origin Offset [mm] ORIGIN OFFSETS wrt SLRF2008 AC(grgs)

CC(ilrsa) v60n

Mean/Std. Dev.: 0.61 ± 4.40 Count:1083 Mean/Std. Dev.: 1.21 ± 4.34 Count:1086 Mean/Std. Dev.: 0.31 ± 8.93 Count:1084

Zoom From Jan 4, 1993 To Dec 28, 2013

DATE

Tz Origin Offset [mm]

ORIGIN OFFSETS wrt SLRF2008 AC(grgs) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-60

-40

-20

0

20

40

3d 1w 1m 6m 1y All

Highcharts.com

TX Origin Offset [mm] ORIGIN OFFSETS wrt SLRF2008 AC(jcet)

CC(ilrsa) v60n

TY Origin Offset [mm]ORIGIN OFFSETS wrt SLRF2008 AC(jcet)

CC(ilrsa) v60n

TZ Origin Offset [mm] ORIGIN OFFSETS wrt SLRF2008 AC(jcet)

CC(ilrsa) v60n

Mean/Std. Dev.: 0.69 ± 4.01 Count:1091 Mean/Std. Dev.: 1.19 ± 4.25 Count:1091 Mean/Std. Dev.: -0.15 ± 8.12 Count:1090

Zoom From Jan 4, 1993 To Dec 28, 2013

DATE

Tz Origin Offset [mm]

ORIGIN OFFSETS wrt SLRF2008 AC(jcet) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-60

-40

-20

0

20

40

3d 1w 1m 6m 1y All

Highcharts.com

TX Origin Offset [mm] ORIGIN OFFSETS wrt SLRF2008 AC(nsgf)

CC(ilrsa) v60n

TY Origin Offset [mm]ORIGIN OFFSETS wrt SLRF2008 AC(nsgf)

CC(ilrsa) v60n

TZ Origin Offset [mm] ORIGIN OFFSETS wrt SLRF2008 AC(nsgf)

CC(ilrsa) v60n

Mean/Std. Dev.: 1.14 ± 5.66 Count:1079 Mean/Std. Dev.: 0.76 ± 5.09 Count:1076 Mean/Std. Dev.: -0.40 ± 10.66 Count:1075

Zoom From Jan 11, 1993 To Dec 28, 2013

DATE

Tz Origin O

ffset [mm

]

ORIGIN OFFSETS wrt SLRF2008 AC(nsgf) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-60

-40

-20

0

20

40

3d 1w 1m 6m 1y All

Highcharts.com

10/13/2014 EVALUATION OF WEEKLY AWG PRODUCTS

http://geodesy.jcet.umbc.edu/ILRS_QCQA_W_v60/generateresults_W.php 3/3

TX Origin Offset [mm]

ORIGIN OFFSETS wrt SLRF2008 AC(gfz)

CC(ilrsa) v60n

TY Origin Offset [mm]

ORIGIN OFFSETS wrt SLRF2008 AC(gfz)

CC(ilrsa) v60n

TZ Origin Offset [mm]

ORIGIN OFFSETS wrt SLRF2008 AC(gfz)

CC(ilrsa) v60n

Mean/Std. Dev.: 1.06 ± 4.86 Count:1087 Mean/Std. Dev.: 0.75 ± 4.13 Count:1087 Mean/Std. Dev.: 0.61 ± 9.19 Count:1085

Zoom From Jan 4, 1993 To Dec 28, 2013

DATE

Tz Origin Offset [mm]

ORIGIN OFFSETS wrt SLRF2008 AC(gfz) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-40

-20

0

20

3d 1w 1m 6m 1y All

Highcharts.com

TX Origin Offset [mm] ORIGIN OFFSETS wrt SLRF2008 AC(esa)

CC(ilrsa) v60n

TY Origin Offset [mm]ORIGIN OFFSETS wrt SLRF2008 AC(esa)

CC(ilrsa) v60n

TZ Origin Offset [mm] ORIGIN OFFSETS wrt SLRF2008 AC(esa)

CC(ilrsa) v60n

Mean/Std. Dev.: 1.11 ± 4.14 Count:1094 Mean/Std. Dev.: 1.31 ± 4.00 Count:1091 Mean/Std. Dev.: 1.05 ± 7.93 Count:1087

Zoom From Jan 4, 1993 To Dec 28, 2013

DATE

Tz Origin Offset [mm]

ORIGIN OFFSETS wrt SLRF2008 AC(esa) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-60

-40

-20

0

20

40

3d 1w 1m 6m 1y All

Highcharts.com

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SLR  TRF  Scale  wrt  SLRF2008  

Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   30  

TX Origin Offset [mm] ORIGIN OFFSETS wrt SLRF2008 AC(nsgf)

CC(ilrsa) v60n

TY Origin Offset [mm]ORIGIN OFFSETS wrt SLRF2008 AC(nsgf)

CC(ilrsa) v60n

TZ Origin Offset [mm] ORIGIN OFFSETS wrt SLRF2008 AC(nsgf)

CC(ilrsa) v60n

Mean/Std. Dev.: 1.14 ± 5.66 Count:1079 Mean/Std. Dev.: 0.76 ± 5.09 Count:1076 Mean/Std. Dev.: -0.40 ± 10.66 Count:1075

Zoom From Jan 11, 1993 To Dec 28, 2013

DATE

Tz Origin O

ffset [mm

]

ORIGIN OFFSETS wrt SLRF2008 AC(nsgf) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-60

-40

-20

0

20

40

3d 1w 1m 6m 1y All

Highcharts.com

EVALUATION OF WEEKLY AWG PRODUCTS

SCALE wrt SLRF2008 AC(bkg) CC(ilrsa) v60n

Mean/Std. Dev.: 0.51 ± 0.56 Count:1082

Zoom From Jan 4, 1993 To Dec 28, 2013

DATE

SCALE [ppb]

SCALE wrt SLRF2008 AC(bkg) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-6

-4

-2

0

2

4

1w 1m 6m 1y 2y 3y All

Highcharts.com

EVALUATION OF WEEKLY AWG PRODUCTS

SCALE wrt SLRF2008 AC(asi) CC(ilrsa) v60n

Mean/Std. Dev.: 0.41 ± 0.60 Count:1089

Zoom From Jan 4, 1993 To Dec 28, 2013

DATE

SCALE [ppb]

SCALE wrt SLRF2008 AC(asi) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-6

-4

-2

0

2

4

1w 1m 6m 1y 2y 3y All

Highcharts.com

EVALUATION OF WEEKLY AWG PRODUCTS

SCALE wrt SLRF2008 AC(dgfi) CC(ilrsa) v60n

Mean/Std. Dev.: 0.46 ± 0.65 Count:1091

Zoom From Jan 4, 1993 To Dec 28, 2013

DATE

SCALE [ppb]

SCALE wrt SLRF2008 AC(dgfi) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-6

-4

-2

0

2

4

1w 1m 6m 1y 2y 3y All

Highcharts.com

EVALUATION OF WEEKLY AWG PRODUCTS

SCALE wrt SLRF2008 AC(esa) CC(ilrsa) v60n

Mean/Std. Dev.: 0.95 ± 0.56 Count:1046

Zoom From Jan 4, 1993 To Dec 28, 2013

DATE

SCALE [ppb]

SCALE wrt SLRF2008 AC(esa) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-6

-4

-2

0

2

4

1w 1m 6m 1y 2y 3y All

Highcharts.com

EVALUATION OF WEEKLY AWG PRODUCTS

SCALE wrt SLRF2008 AC(gfz) CC(ilrsa) v60n

Mean/Std. Dev.: 0.23 ± 0.75 Count:1085

Zoom From Jan 4, 1993 To Dec 28, 2013

DATE

SCALE [ppb]

SCALE wrt SLRF2008 AC(gfz) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-6

-4

-2

0

2

4

1w 1m 6m 1y 2y 3y All

Highcharts.com

EVALUATION OF WEEKLY AWG PRODUCTS

SCALE wrt SLRF2008 AC(grgs) CC(ilrsa) v60n

Mean/Std. Dev.: 0.40 ± 0.57 Count:1083

Zoom From Jan 4, 1993 To Dec 28, 2013

DATE

SCALE [ppb]

SCALE wrt SLRF2008 AC(grgs) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-6

-4

-2

0

2

4

1w 1m 6m 1y 2y 3y All

Highcharts.com

EVALUATION OF WEEKLY AWG PRODUCTS

SCALE wrt SLRF2008 AC(jcet) CC(ilrsa) v60n

Mean/Std. Dev.: 0.37 ± 0.54 Count:1091

Zoom From Jan 4, 1993 To Dec 28, 2013

DATE

SCALE [ppb]

SCALE wrt SLRF2008 AC(jcet) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-6

-4

-2

0

2

4

1w 1m 6m 1y 2y 3y All

Highcharts.com

EVALUATION OF WEEKLY AWG PRODUCTS

SCALE wrt SLRF2008 AC(nsgf) CC(ilrsa) v60n

Mean/Std. Dev.: 0.19 ± 0.77 Count:1079

Zoom From Jan 4, 1993 To Dec 28, 2013

DATE

SCALE [ppb]

SCALE wrt SLRF2008 AC(nsgf) CC(ilrsa) v60n

1994 1996 1998 2000 2002 2004 2006 2008 2010 2012

1995 2000 2005 2010

-6

-4

-2

0

2

4

1w 1m 6m 1y 2y 3y All

Highcharts.com

Page 31: Modeling)Improvements)in)the)ILRS) Reprocessing)for)ITRF2013)) · 7824 San Fernando 100 CSPAD No CNTL s->m 2.5 30 25 252-246 249 7825 Stromlo 10 CSPAD CNTLD s->m 2.5 4 10 257-247

Official  &  Back-­‐up  CombinaOon  Results  

Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   31  

Page 32: Modeling)Improvements)in)the)ILRS) Reprocessing)for)ITRF2013)) · 7824 San Fernando 100 CSPAD No CNTL s->m 2.5 30 25 252-246 249 7825 Stromlo 10 CSPAD CNTLD s->m 2.5 4 10 257-247

Official  &  Back-­‐up  CombinaOon  Results  

Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   32  

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Summary  

•  The ILRS AWG implemented new models and data screening

•  The adoption of these changes caused some delay at some ACs that had to modify their code to implement them

•  Delivery of 1983-2013 ILRS combination to ITRS last week

•  ITRS will notify the ILRS AWG of any new “breaks” that we deem appropriate in the series and we will reach consensus

•  If necessary, ILRS will deliver selected new SINEXs from ACs and a new combination from the CCs to ITRS.

•  Development of an ITRF2014 under discussion—ILRS committed to support this within the foreseeable timeframe

33  Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA  

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Erricos  C.  Pavlis      10/28/2014   19th  ILW  2014,  Annapolis,  MD,  USA   34  

We  would  like  to  thank  the  eight  individual  ILRS  Analysis  Centers  for  

their  support  of  the  ILRS  products  and  their  sponsoring  organiza+ons,  and…  


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