IDS activity report 2011 - International DORIS Service

5 THE NETWORKJérôme Saunier (1)(1) IGN, France5.1 GENERAL STATUS OF THE NETWORKWe lost a station last year – Monument Peak, CA, USA – because of conflicts in frequencywith a nearby TV relay station. Since then, 56 stations make up the DORIS permanentnetwork and two additional stations are dedicated to experimentation: Gavdos (Crete, Greece)and Grasse (France).Figure 2 The permanent network - 56 stationsA good geographical distribution of these stations allowed quality of service even if severalstations are still out of order. That's the other side of the coin: to get well-distributed network,you need stations out of the way but harder to maintain…Six stations are out of order for over a year: Yuzhno-Sakhalinsk, Futuna, Santa Cruz, Socorro,Tristan da Cunha, and Port Moresby.23