"SPSLCMP IV Field Survey Visit Papua New Guinea (Manus"
SOUTH PACIFIC APPLIED GEOSCIENCE COMMISSION SPSLCMP IV Field Survey Visit Papua New Guinea (Manus Island) 21st to 31st January 2006 SOPAC Trip Report 404 Andrick Lal Project Officer – Surveying Ocean & Islands Programme SUMMARY The South Pacific Sea Level & Climate Monitoring Project commenced in Manus Island, Papua New Guinea (PNG) in 1994 and the project personnel from the Geoscience Australia and South Pacific Applied Geoscience Commission successfully completed the eighth precise differential levelling survey of the deep benchmark array in October 2005. The levelling run was made from the SEAFRAME Station at the Lumbrum Jetty to the CGPS Station. Along the levelling run, connections were made to all the five deep benchmarks and to the three reference marks of the CGPS Pillar. Precise Differential Levelling Surveys from one of the deep benchmark at the The Precision Monitoring Levelling Survey Naval Base, Lumbrum, Manus Island, PNG. Programme with the two methods was completed in five (5) days. The geodetic survey programme was carried out successfully. All the deep benchmarks were found from the previous survey except for the deep benchmark PNG30, which was covered under a pile of loose aggregates, was not located even after several attempts to find it. Also unfortunate was that the locality diagram for the deep benchmark was also unavailable. The one and a half kilometre of survey array with the two methods: Precise Differential Levelling Survey using Leica NA3003 Digital Level and Starves; and Precision Levelling Survey using Leica TCA180 Total Station with Prism and Poles. was carried out in the Geodetic Survey Component 2 of the SPSLCMP. Both the survey methods achieved the standard of accuracy and precision as per first order geodetic levelling of within the limits of 2√k. [SOPAC Trip Report 404 – Lal]  Introduction The South Pacific Sea Level and Climate Monitoring Project of Phase IV aims to help the Pacific Island countries understand the implications and scale of sea level and climate changes. The duties of the “Project Officer – Surveying” in this project concentrates on the objectives stated below. But overall this project is established to: – a. Set up high-resolution monitoring stations in the South Pacific region to compute relative motions of land and sea at each station based in each of the twelve countries. b. Carry out a geodetic survey programme (Precision Levelling Monitoring Surveys) to measure movements of the crust at the other strategic sites in each country with respect to the reference station under the coordination of Geoscience Australia. c. Help identify changes to sea levels with reference to a similar network of stations in Australia and elsewhere in the world, whether these changes are due to thermal expansion of the ocean, contributions from the land ice or changing properties of water from different ocean zones. d. Provide a measure of regional vertical controls and exchange information and data with national, regional and international climate change centres in relation to the ongoing international geodetic programmes, which incorporate satellite altimetry and radio astronomy. Objective 1. To collect and reduce the precise differential levelling survey data using the Digital Level and Starves adapting to the traditional geodetic method of levelling between the Sea Level recorders, benchmark arrays and CGPS receiver in the field as part of the South Pacific Sea Level and Climate Phase IV Project funded by AusAID. The previous Precise Differential Levelling Survey was carried out in November 2003. 2. To monitor and identify changes to sea levels in the South Pacific that is due to thermal expansion of the ocean, glaciations from the land ice or changing properties in the continental plates between zones. 3. To assist Mr Steve Yates of Geoscience Australia carry out the Precision Levelling Survey and the CGPS Monitoring Survey as part of the geodetic levelling survey component using the Total Station and the Prism Pole. List of People involved/consulted Field Survey Team Members Steve Yates (Geodetic Operations – Geoscience Australia) Andrick Lal (Ocean & Islands Programme – South Pacific Applied Geoscience Commission) Manus Island (PNG) Mr Kanawi Sindol, Asst. Administrator – Division of Lands (DL), Manus Provincial Government Mr Milton Sepak – Communications Officer, Lumbrum Naval Base, Manus Island, Field Survey Schedule As per field schedule, the survey team arrived in Manus Island (PNG) on the 25th of January 2006 and the precision levelling survey using the Digital Level (conventional) and the Total Station (digital) was completed in 5 days. The field survey visit concluded on the 30th of January [SOPAC Trip Report 404 – Lal]  2006. During the survey visit, the maintenance visit and the reference mark monitoring survey were also accomplished. The survey site is located in Lumbrum, naval base for the Papua New Guinea Navy and we resided 25 kilometres away in the heart of Manus Island Town, Lorengau. Acknowledgement The Lands Division of the Manus Provincial Government and the Naval Division of Manus Island provided valuable support during the field survey visit. Itinerary Activity Name – South Pacific Sea Level & Climate Monitoring Project Phase ACTION III (O.I.P 2.2.1) Date Time 21/01/06 0630 Checked in at the Nausori Airport. OIP/AL – Left Suva for Nadi. 1000 Checked in at the Nadi Airport. – Left Nadi for Brisbane, Australia. 1400 Arrived in Brisbane and stayed at the Airport Heritage Hotel. 22/01/06 0800 Checked in at the Brisbane Airport. OIP/AL – Flight cancelled due to non-arrival of the Air Niugini aircraft from Tokyo. GA/SY Accommodated by Air Niugini into Carlton Crest Hotel in the Brisbane City for the night. 23/01/06 0900 Checked in at the Brisbane Airport. OIP/AL – Left Brisbane Airport for Port Moresby. GA/SY 1500 Arrived in Port Moresby, Papua New Guinea and checked in at the Gateway Hotel. 24/01/06 0800 Stayed at the Gateway Hotel in Port Moresby. OIP/AL [SOPAC Trip Report 404 – Lal]  Itinerary Activity Name – South Pacific Sea Level & Climate Monitoring Project Phase ACTION III (O.I.P 2.2.1) Date Time 25/01/06 0530 Checked in at the Port Moresby Domestic Lounge. OIP/AL – Left Port Moresby for Manus Island. GA/SY 0730 Arrived in Manus Island. – Checked in at the Harbourside Hotel in Lorengau. – Picked up the rental car. – Picked up the survey gear from the project manager, Mr Kanawi Sindol. Reconnaissance Survey – – Located all the deep benchmarks. – PNG30 was found to be under the pile of gravel and due to unavailability of the locality diagram page, the benchmark was not found even though an effort was made to remove the gravel and locate it. Deep benchmark, PNG30 covered under the pile of aggregates. 25/01/06 1100 Reference mark surveys and levelling from the CGPS Pillar to the reference OIP/AL marks using the Total Station. GA/SY 1500 Precision Levelling Surveys using Total Station with Prism and Poles from the deep benchmark PNG31 to the CGPS BM (PNGM). 1700 Marking off the Survey Bays from the tide gauge to the deep benchmarks. Digital Survey data closure check and accuracy standards using Survey Programme; Levelling.exe 26/01/06 0830 Precision Levelling Surveys using Total Station with Prism and Poles from the OIP/AL tide gauge to the deep benchmark PNG31. GA/SY Digital Survey data closure check and accuracy standards using Survey Programme; Levelling.exe 27/01/06 0830 Reconnaissance survey of all the temporary benchmarks for the Precise OIP/AL Differential Levelling Surveys. GA/SY Assembled the Invar bar-coded staff together with the Struts. Precise Differential Levelling Survey from the tide gauge to the deep benchmark PNG31. Approximately one kilometre of precise differential levelling survey completed. Reduction and closure check of the levelling survey data at the end of the day. [SOPAC Trip Report 404 – Lal]  Itinerary Activity Name – South Pacific Sea Level & Climate Monitoring Project Phase ACTION III (O.I.P 2.2.1) Date Time 28/01/06 0830 Precise Differential Levelling Survey from the deep benchmark PNG31 to the OIP/AL CGPS Pillar. GA/SY Approximately 500 m of precise differential levelling survey completed. Reduction and closure check of the levelling survey data at the end of the day. 29/01/06 0830 Precise Differential Levelling Survey from the deep benchmark PNG1 to the OIP/AL PNG2. GA/SY Approximately 300 m of precise differential levelling survey completed. Took photographs and covered all the deep benchmarks. Packed up all the survey gear for freight via DHL to Kiribati. Reduction and closure check of the levelling survey data at the end of the day. Precise Differential Levelling survey data downloaded from the Leica NA3003. 30/01/06 1200 Freighted all the survey gear to Kiribati via DHL Express. OIP/AL Checked in at the Momote Airport, Manus Island. GA/SY – Left Manus for Port Moresby. Checked in at the Crown Plaza Hotel in Port Moresby. 31/01/06 0700 Checked in at the Port Moresby Airport. OIP/AL – Left Port Moresby for Brisbane. GA/SY 1500 Checked in at the Brisbane Airport. – Left Brisbane for Nadi. OIP/AL 2100 Arrived in Nadi. 01/02/06 0700 Checked in at the Nadi Airport. OIP/AL – Left Nadi for Suva. Additional Notes and Comments Action The survey report with all the survey computations, adjustments and results will be prepared into a survey AL/SOPAC technical report. In comparison to this method of precise differential levelling survey, the total station SY/GA method, survey report will be prepared by Steve Yates of Geoscience Australia. Reference Documents SOPAC Work Plan: – Ocean & Islands Task Activity 2.2.1 South Pacific Sea Level & Climate Monitoring Project Phase IV – Annual Plan 2004 – 2005 (Component 2) [SOPAC Trip Report 404 – Lal]