Last Update: 10th January 2020

For Users of the Nobeyama 45-m Telescope Open Use Program


The basic observing mode is a remote operation. Nobeyama Radio Observatory (NRO) offers the observation support by observatory staff remotely from the Nobeyama site. Rules about the assistant are as follows:

Rules of the Operation of the Nobeyama 45-m Telescope

Rules for Suspension of the Observation

For the weather and instrumental reasons, the observatory demands a suspension of the operation. If the observer encounters these situations, please stop the observation and follow the instruction. For each case, make sure that

The observer can leave the remote site after these three procedures above are properly executed.

The following rules are the criteria and the instructions for the suspension of the operation:

  1. Strong Wind
  2. Snowfall
  3. High Risk of a Frozen Gear
  4. Rise of Temperature of FOREST Receiver
  5. Bad Weather
    In the case of observation at 100 GHz and higher frequency, no good results can be expected under the following conditions: Under such situations, the observer can give up the observation (, although the observing time may not be compensated).
  6. Earthquake
  7. Other Reasons
    The observatory may suspend observations for other reasons.

Rules for Redundant Observing Time

The time slots that are not explicitly allocated between observations (white-coloured slots on the schedule) are basically used for measurements or test observations by the observatory. If no measurement or test observation is planed, the assistant will announce the situation on #ObsMessages at Rocket.Chat (Note that no announcement may be made for the night-time). In this case, you can share and make use of the extra time after mutual consultation with relevant observers whose observation slot is allocated on before or after that time. Before starting the observation, please declare it on #ObsMessages at Rocket.Chat as the observing time officially allocated.