After Johan Oskar Backlund, 1846-1916, Swedish-Russian astronomer, managing director of the observatory at Pulkovo. Originator of Swedish-Russian co-operation for measuring a meridian arc at Spitsbergen. Member of the commission for the Swedish-Russian Arc-of-Meridian measurements 1899-1902, leader of the geodetic field work on Spitsbergen in the summer of 1899 and 1901. Also on Spitsbergen in 1910 on board the steamer "Ile de France". Trigonometric station of the Swedish-Russian Arc-of-Meridian Expedition 1899-1902. Signal put up by Helge Backlund of the Arc-of-Meridian Expedition on August 19, 1900. Observations by A. Wasiliew in 1900 and 1901
Trig. sta. of the Swedish-Russian Arc-of-Meridian Expedition 1899-1902. Sig- nal put up by Helge Backlund of the Arc-of-Meridian Expedition on Aug. 19, 1900 (Wittram (1904) p.57). Observations by A.Wassiliew in 1900 and 1901.