17:15 〜 19:15
[PEM10-P13] High energy particle environment at geosynchronous orbit during May 2024 severe storm event
キーワード：宇宙天気予報、衛星障害、高エネルギー粒子、静止軌道
Geomagnetic storm occurred during May 10-13, 2024 is the largest storm in the last 19 years since August 2005. Since the magnitude of the storm was comparable to the 2003's Halloween event, which initiated large numbers of spacecraft anomalies, there were concerns about the space weather impact on meteorological satellites and their operations.
After the severe space weather storm event, Coordination Group for Meteorological Satellites (CGMS) asked the member agencies to provide information about impacts on satellite operations and satellite itself, and implementation of any measures for the satellite or satellite operations due to severe space weather disturbances.
The results of the survey suggested that most of the GEO and LEO satellites did not report having anomalies and/or no more anomalies than usual. On the contrary, some of LEO satellites experienced significant increase in attitude control momentum wheel speeds, and Some of LEO satellites experienced error of the orbit determination algorithms. There was no special operational measures were required during the storm period.
NICT has established new forecast and warning criteria considering social impact since June 2022. And we are now implementing new space weather warning system based on new criteria. During May 2024 server storm, Kp=9 was identified three times during this event. This condition is 4th Level of geomagnetic disturbances, and it is highly possible for serious spacecraft anomaly. However, there is no/minor impact for spacecraft and its operation. This might be because the energetic particle environment in geostationary orbit was not as severe as in the 2003's Halloween event.
In this presentation, high energy particle environment at geosynchronous orbit during May 2024 severe storm event will be examined in detail using Himawari/SEDA, GOES/SEIS, and space environment data from other GEO satellites, and discuss about the difference between the 2003's Halloween event and this event.
After the severe space weather storm event, Coordination Group for Meteorological Satellites (CGMS) asked the member agencies to provide information about impacts on satellite operations and satellite itself, and implementation of any measures for the satellite or satellite operations due to severe space weather disturbances.
The results of the survey suggested that most of the GEO and LEO satellites did not report having anomalies and/or no more anomalies than usual. On the contrary, some of LEO satellites experienced significant increase in attitude control momentum wheel speeds, and Some of LEO satellites experienced error of the orbit determination algorithms. There was no special operational measures were required during the storm period.
NICT has established new forecast and warning criteria considering social impact since June 2022. And we are now implementing new space weather warning system based on new criteria. During May 2024 server storm, Kp=9 was identified three times during this event. This condition is 4th Level of geomagnetic disturbances, and it is highly possible for serious spacecraft anomaly. However, there is no/minor impact for spacecraft and its operation. This might be because the energetic particle environment in geostationary orbit was not as severe as in the 2003's Halloween event.
In this presentation, high energy particle environment at geosynchronous orbit during May 2024 severe storm event will be examined in detail using Himawari/SEDA, GOES/SEIS, and space environment data from other GEO satellites, and discuss about the difference between the 2003's Halloween event and this event.