K001-7071
Event
Event NameNZARP| Hydrology| Glaciology Programme| Wright Valley|1970-1971AbstractTriangulation and Photo Control: Several weeks were spent extending the existing triangulation around Lake Vanda and the Asgard Range| eastward towards the Bull Pass and the Heimdall Glacier. This work provides the basis for measuring glacier movement stakes and position photo control points. Glacier Movement poles: Movement poles were observed on the Jeremy Sykes Glacier and two new trig. stations established to facilitate this work. Margin poles on the Alberich and Heimdall Glaciers were observed to at the start of the season and the end from both ends of a chained base line. From this the movement will be calculated. Astro Fixes: Daylight stars were observed from trig. AB at teh Asgard hut over a twelve hour period. About ten stars were observed and used to obtain a position line fix for the stronomical position of the station. Photo Theodolite Surveys: Photo theodolite stations established by Dr Sergey Myagkov were connected to teh Asgard triangulation and his baselines fir stereoscopic points chained. Briefly this work consisted of taking photos with a Zeiss photo-theodolite of hte Jeremy Sykes glacier from various poitions sited to give good intersections. at each station two points about 50m apart were occupied so a stereo effect could be obtained. This work was done early in the season and repaeated in late January. From it Dr Myagkov hopes to be able to contour map parts of the glacier and from the parallax in the photographs taken at two different times| meadure the movement of the ice. The stations are marked with terrier bolts or holes drilled in rocks with cairns built over them. Surveys around Vanda Station: At Vanda levels were taken when required of lake water levels and water level recording equipment. A topographical survey of the buildings and equipment around Vanda Station was made. Vanda- Bay of Sails Levelling: In January a levelling traverse was undertaken from Vanda Station to the Bay of Sails to dtermine the height of the lake above sea level|. The height of trig. station A was determined at 341.1 ft asl. The previously accepted height was 512.0 ft.PersonnelTrevor Chinn (Glaciologist/hydrologist)AR Estrick (Surveyor)G Baker (Field assistant)LocationsVanda StationSykes GlacierHeimdall GlacierUpper Wright GlacierAlberich GlacierGeolocation[1] Position[2] Position[3] Position[4] Position[5] PositionSeason1970-1971
K001-7071. Antarctica NZ, accessed 09/07/2025, https://adam.antarcticanz.govt.nz/nodes/view/38314