Dear Gohar,
Thank you very much for your enquire. I did check the status of the Armenian Yerevan upper-air station on the daily availability map. In fact on the pop-up window below the Number of Expected observations (#Expected: 2) there is the comment "Default schedule". WDQMS is assuming a default schedule (2 observations per day, at 00 and 12UTC) because there is no schedule available in OSCAR/Surface for this station. Since the station is only reporting at 00UTC, it is shown as a "green" dot on the 00UTC availability map and as a black "dot" on the 12UTC availability map. On the daily view, WDQMS expect 2 ascents per day and the station only sends one, therefore it's displayed as a red dot (Availability issues). The only way to fix this is by updating the OSCAR/Surface accordingly.
Regards,
Cristina Prates