geodesy

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

Private trig benchmark at Kotzia Squate, Athens. (P8170082) This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

An old trig point in the NTUA Campus, Zografos, Greece. (P6270041) This work is licensed under a Creative Commons Attribution 4.0 International License .

(P9050049) This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

A new style trig point in the NTUA campus, Zografos, Greece. (P7030068) This work is licensed under a Creative Commons Attribution 4.0 International License .

A neat small pyramid trig point (T2, Δ10/2006) at Kallirois street. (PA210025) This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License .

A rusty benchmark of the Hellenic Mapping & Cadastral Organisation in Kifissia. Οργανισμός Κτηματολογίου και Χαρτογραφήσεων Ελλάδος (DSCN0078)

A benchmark of the Hellenic Mapping & Cadastral Organisation outside Tauros Metro station. Οργανισμός Κτηματολογίου και Χαρτογραφήσεων Ελλάδος (20190117_130705)

Antenna mast of an abandoned VHF repeater site with a UHF radio link, Mount Olympus, Lesbos Island. (DSCN1312) This work is licensed under a Creative Commons Attribution 4.0 International License .

South Aftica: stamp of 15c in honour of Dr. Trevor Wadley (1920-1981), inventor of the Tellurometer EDM and the Wadley Loop receiver tuning system (1979).

Roland DF3LZ on twitter: The station emitting DORIS signals in Wettzell on 401.25 and 2036.25 MHz. STAREC dual band antenna shown. (EM-LfZzWoAEvjNk.jpg)

DORIS antenna blueprint www.aviso.altimetry.fr/en/techniques/doris.html

The STAREC UHF transmitting antenna of DORIS DIONYSOS (DIOB) ground segment station (beacon) at Dionysos, Greece. DORIS ground segment beacons transmit to the satellites on 2036.25 MHz and 401.25 MHz. Signals are picked up and processed by small receivers on satellites using this system, like TOPEX/Poseidon and JASON. For more info on this system visti the following pages: * ids-doris.org ] ids-doris.org * en.wikipedia.org/wiki/DORIS_(geodesy) (DSC_0719) This work is licensed under a Creative Commons Attribution 4.0 International License .

The STAREC UHF transmitting antenna of DORIS DNO ground station (beacon) at Dionysos, Greece. DORIS ground segment beacons transmit to the satellites on 2036.25 MHz and 401.25 MHz. Signals are picked up and processed by small receivers on satellites using this system, like TOPEX/Poseidon and JASON. www.aviso.altimetry.fr/en/techniques/doris.html See also DORIS article on Wikipedia. Photograph also uploaded on Wikimedia Commons: commons.wikimedia.org/wiki/File:DNO_DORIS.jpg To the extent possible under law, Costas has waived all copyright and related or neighboring rights to DORIS DNO station (2010) . This work is published from Greece .