National Mapping’s Astro-Geodetic Observatory at Orroral Establishing the First Order, Horizontal and Vertical Control Network, 1975 Photographs by Klaus Leppert, courtesy of his daughter Kathy
Observatory dome right and Natmap vehicles from collimation tower	Observation tent, shading Model 8 Laser Geodimeter, from collimation tower
Model 8 Laser Geodimeter operated by Bob Twilley	(L-R) Barry Sloane, Bob Twilley and Jack Edmonstone
(L-R) Barry Sloane and Chris Conway with Jenoptik Koni 007 level	Staffman Harry Granger with oversight by Tony Bomford
Harry Granger	Harry Granger
(L-R) Barry Sloane and Chris Conway with Jenoptik Koni 007 level	Bob Bryant
Orroral BBQ lunch for 1975 visit by Professor Paul J Melchior (1925-2004); the professor is seated with his hands on his knees chatting with Adrian Roelse.
Observation location at Astro-Geodetic Observatory with SAO/NASA’s Orroral Valley Space Tracking Station on valley floor
SAO/NASA’s Orroral Valley Space Tracking Station. This facility formed part of the National Aeronautics and Space Administration (NASA) Spacecraft Tracking and Data Acquisition Network (STADAN). It ultimately became obsolete and was closed in 1985 and unfortunately due to excessive vandalism the site was later bulldozed leaving only the footprint visible below from Google Earth (2019).