Presentation is loading. Please wait.

Presentation is loading. Please wait.

Absolute gravimetry at UMB in 2007 - preliminary observational results with FG5-226 B. R. Pettersen, K. Breili, J. G. O. Gjevestad, D. I. Lysaker, O. Øvstedal.

Similar presentations


Presentation on theme: "Absolute gravimetry at UMB in 2007 - preliminary observational results with FG5-226 B. R. Pettersen, K. Breili, J. G. O. Gjevestad, D. I. Lysaker, O. Øvstedal."— Presentation transcript:

1 Absolute gravimetry at UMB in preliminary observational results with FG5-226 B. R. Pettersen, K. Breili, J. G. O. Gjevestad, D. I. Lysaker, O. Øvstedal Department of Mathematical Sciences and Technology, University of Environmental and Life Sciences, P O Box 5003, N-1432 Ås, Norway. O. C. D. Omang, Norwegian Mapping Authority, N-3507 Hønefoss

2 Observing campaigns FG5-226 in 2007  Jan-Jun: Time series at Trysil and Ås  May: Comparison at Onsala (FG5-220)  June-July: Norway + Sweden  Aug: Comparison at Trysil (FG5-233)  Aug: Norway (south)  Nov: Comparison at Walferdange  Nov-Dec: Time series at Trysil and Ås

3 Observing log FG5-226, I DateSiteObserversRemarks 2007 Jan 19-20ÅsKB 2007 Jan 23-25Trysil-ACKB 2007 Feb 05ÅsKB 2007 Feb 08ÅsKB 2007 Feb 27-28Trysil-ACKB 2007 Mar 06ÅsJGOG 2007 Mar 28Trysil-ACKB 2007 Apr 23-26ÅsKBEQs removed 2007 May 07-08Onsala-ANJGOGSimultaneously 2007 May 08-09Onsala-ASJGOGwith FG May 12ÅsKB, BRP 2007 May 31Trysil-ACKB 2007 Jun 04ÅsDIL 2007 Jun 15-18Hønefoss-ACOCDO, BRP 2007 Jun 19-21Trondheim-AAOCDO 2007 Jun 25-28Andøya-AlomarDIL 2007 Jun 28-31Andøya-RRDILNew station

4 Observing log FG5-226, II DateSiteObserversRemarks 2007 Jul 01TromsøDILadmission denied 2007 Jul 05-08HonningsvågKB 2007 Jul 09-11KirunaKB 2007 Jul 13-15Bodø NewKB 2007 Jul 17-19ØstersundOØ, BRP 2007 Jul 19Trysil-ACOØ, BRP 2007 Jul 31-Au 1Trysil-ACBRPSimultaneously 2007 Aug 01-02Trysil-ABBRPwith FG Aug 08-09ÅsKB 2007 Aug 20-23Stavanger-AABRP 2007 Sep 09-10Trysil-ACKB 2007 Nov 06-07Walferdange-C4BRP, JGOGInternational 2007 Nov 07-08Walferdange-A5BRP, JGOGcomparison 2007 Nov 08-09Walferdange-B2BRP, JGOGwith several 2007 Nov 09-10Walferdange-B4BRP, JGOGFG5-instruments 2007 Nov 29-31Trysil-ACKB 2007 Dec 12-13ÅsKB

5 Preliminary results FG5-226, I SiteDateNo. of obsg[μGal]precision [µGal] Ås2007 Jan ± 3.3 Trysil-AC2007 Jan ± 1.8 Ås2007 Feb ± 2.9 Ås2007 Feb ± 3.3 Trysil-AC2007 Feb ± 2.2 Ås2007 Mar ± 2.3 Trysil-AC2007 Mar ± 2.9 Ås2007 Apr ± 2.2 Onsala-AN2007 May ± 2.7 Onsala-AS2007 May ± 2.3 Ås2007 May ± 2.3 Trysil-AC2007 May ± 2.2 Ås2007 Jun ± 2.8 Hønefoss-AC2007 Jun ± 2.9 Trondheim-AA2007 Jun ± 3.3 Andøya-Alomar2007 Jun ± 1.9 Andøya-RR2007 Jun ± 4.1

6 Preliminary results FG5-226, II SiteDateNo. of obs g[ µGal ] Precision [µGal] Tromsø2007 Jul 01admission denied Honningsvåg2007 Jul ± 5.4 Kiruna2007 Jul ± 2.4 Bodø new2007 Jul ± 3.3 Østersund2007 Jul ± 2.3 Trysil-AC2007 Jul ± 1.6 Trysil-AC2007 Jul 31-Au ± 1.8 Trysil-AB2007 Aug ± 2.6 Ås2007 Aug ± 1.6 Stavanger2007 Aug ± 2.1 Trysil-AC2007 Sep ± 1.9 Walferdange-C42007 Nov ± 1.7 Walferdange-A52007 Nov ± 1.1 Walferdange-B22007 Nov ± 1.0 Walferdange-B42007 Nov ± 1.7 Trysil-AC2007 Nov ± 5.4 Ås2007 Dec ± 2.5

7 Remarks  drops per site  2-3 full day runs per site  Typical rms: ± 1-3 µGal  Improved OTL modelling at coastal sites  Electronics problems with laser controller and dropper in October  Vacuum leak continues to develop

8 Summary  Total: 17 stations observed in 2006  1 new station observed in 2007  Comparison with FG5-220 at Onsala  Comparison with FG5-233 at Trysil  Multiple comparisons at Walferdange  Time series continued at Trysil and Ås

9 Posters and publications  Lysaker, D. I., Breili, K., Gjevestad, J. G., Omang, O. C., Pettersen, B. R.: Ocean tide loading along the Norwegian coast. Poster på EGU 2007, Wien april Geophysical Research Abstracts 9, ISSN  Breili, K., Lysaker, D. I., Pettersen, B. R.: Ocean tide loading models for coastal gravity observations. Poster på EGU 2007, Wien april Geophysical Research Abstracts 9, ISSN  Breili, K., Kristiansen, O., Pettersen, B. R.: Seasonal gravity variations observed by an absolute gravimeter – preliminary results. Poster på EGU 2007, Wien april Geophysical Research Abstracts 9, ISSN  B. R. Pettersen: Postglasial landhevning i Norden – observert med gravimetre, GPS og tidevannsmålere. Foredrag på Geodesi- og Hydrografidagene, Hønefoss november Publisert på  Timmen, L., Gitlein, O., Müller, J., Denker, H., Mäkinen, J., Bilker-Koivula, M., Pettersen, B. R., Lysaker, D. I., Svendsen, J. G. G., Wilmes, H., Falk, R. Reinhold, A., Hoppe, W., Scherneck, H.-G., Engen, B., Omang, O. C. D., Engfeldt, A., Lilje, M., Strykowski, G., Forsberg, R., Observing Fennoscandian geoid change for GRACE validation. Electronic conference proceedings


Download ppt "Absolute gravimetry at UMB in 2007 - preliminary observational results with FG5-226 B. R. Pettersen, K. Breili, J. G. O. Gjevestad, D. I. Lysaker, O. Øvstedal."

Similar presentations


Ads by Google