Arbitrary format transmission of QZSS's disaster and crisis management report

category: gnss

The other day, when I was conducting a reception test the day before the test delivery of the disaster and crisis management report of QZSS (quasi-zenith satellite, petnamed as Michibiki), some data failed to be received, so I investigated the reason using the Michibiki public archive service.

On March 23 and 24, 2021, not only the usual “Japan Meteorological Agency’s disaster and crisis management report (DCR)” (message type 43) but also “arbitrary format DCR” (message type 44) was broadcast. The arbitrary format is used for “disaster report sent from an external organization that was decided after consultation with each organization.” Within a few days before and after, message type 44 was broadcast only on these two days.

Disaster report (at sea)
Announcement time: 20:40 on March 22
Maritime strong wind warning: off Hiyama Tsugaru

MT44: Foreign country (subdivision 10)

MT44: Foreign country (subdivision 10)

MT44: Foreign country (subdivision 10)

MT44: Foreign country (subdivision 10)

Disaster report (at sea)
Announcement time: 20:40 on March 22
Sea icing warning: Sakhalin eastern sea
Sea icing warning: Sakhalin west of the sea
Maritime wind warning: off Abashiri
Maritime wind warning: To the east of Hokkaido
Maritime wind warning: off Kushiro
Maritime wind warning: off Hidaka
Maritime wind warning: Kanto area
Maritime wind warning: off the southern coast of Primorskaya Oblast

In Table 4.1.2-55 Organization Code on page 108 of the interface specification of DCR, it is assigned “Foreign country”, and it is a message issued by the institution with the branch number 10. According to page 5 of the service application note of DCR, “there is no delivery record as of October 2020”, so it may be that someone is conducting a demonstration experiment on new DCR.

Arbitrary format transmission of QZSS's disaster and crisis management report

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