HFD homepage
update: 2009/9/4
What's new!
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2009
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2008
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2007
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2006
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2005
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2004
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2003
/2002/2001/2000/1999/
Stop transmission is scheduled from 06:00JST to 20:00JST on September 5th.
(2009/9/4)
The HF Doppler News, No.31 and No.32 are presented.
(2009/7/8)
The 5006kHz transmission is restarted on November 17, 2008.
(2008/11/17)
The 5006kHz transmission is stopped from October 20, 2008 due to the TX maintainance.
(2008/10/22)
The 8006kHz transmission is restarted on October 20, 2008.
(2008/10/22)
The 8006kHz transmission are continuously stopped since September 18, 2008 due to the TX trouble.
(2008/9/20)
Stop transmissions of 8006kHz were frequently made from September 2nd to September 17th due to the TX trouble.
(2008/9/20)
Stop transmission is scheduled from 20:00JST on September 5th to 10:00JST on September 9th
(2008/8/27)
Stop transmission from 12:45 to 17:15JST on June 8
(2008/6/9)
Stop transmission from Jan. 29th to 30th
(2008/1/31)
The frequency stability was degraded from Jan. 26th to 29th.
(2008/1/31)
The HF Doppler News, No.30, is published on March 15, 2007.
(2007/3/20)
Stop transmission is scheduled from September 1to 2 due to AC-power stop
(2006/8/28)
The HF Doppler News, No.29, is published on February 20, 2006.
(2006/2/23)
The HFD homepage is renewed for the year 2006.
(2006/1/4)
The power-down operation of 5006kHz was made from September 29 to 30 due to the TX trouble.
(2005/10/2)
Stop transmission is scheduled from September 3 to 5 due to AC-power stop
(2005/8/31)
The HFD Kakioka Station is set up in the Kakioka Magnetic Observatory, JMA on Aug. 17, 2005.
(2005/8/21)
The HF Doppler News, No.28, is published on March 15, 2005.
(2005/3/17)
The ministry of Internal Affairs and Communications will have the second round session on the problems of Power Line Communication (PLC) Systems from this January.
(2005/2/5)
(in Japanese)
The JG2XA transmission status is updated for the year 2005.
(2005/2/5)
The number of HFD homepage accesses exceeded 10,000 on November 13, 2004.
(2004/11/13)
JG2XA transmission stopped from 19 to 21 JST on Octorber 25 due to maintainance.
(2004/10/25)
JG2XA transmission will stop from 19 to 20 JST on Octorber 25 due to maintainance.
(2004/10/20)
JG2XA transmission was paused from September 3 to 6 due to AC-power stop.
(2004/9/6)
Stop transmission is scheduled from September 3 to 6 due to AC-power stop
(2004/9/3 rescheduled)
Compilation of Geomagnetic Effects on HF Signals is added.
(2004/9/2)
Stop transmission is scheduled from September 4 to 6 due to AC-power stop
(2004/7/26)
Stop transmission on July 26 due to AC-power failure
(2004/7/26)
Stop transmission on July 15 due to maintainance work of the TX antennas
(2004/7/16)
Stop transmission from May 28 to 29 due to construction work close to the TX antenna
(2004/5/28)
HFD Shizuoka Station is set up in the Shimizu Campus of Tokai University on May 17, 2004.
(2004/5/17)
Locations of TX&RX stations
(2004/5/17 updated)
Characteristics of HFD Receivers
(2004/3/13; 2004/5/14 revised)
HFD Kashima Station is set up in KSRC on March 9, 2004.
(2004/3/10)
HFD Kyoto Station is set up in KUGI on February 26, 2004.
(2004/2/28)
The HF Doppler News, No.27, is published on March 21, 2004.
(2004/2/28)
Report: The HFD TX-station JG2XA made
a modified opetation
from December 18 to 24, 2003.
(2003/12/25)
JG2XA has moved to the highest building in the UEC campus on December 18, 2003.
(2003/12/25)
NOTICE: The HFD TX-station JG2XA will make
a modified opetation
from December 18 to 24, 2003.
(2003/12/16)
NOTICE: The HFD TX-station JG2XA will make a short stop during the last week of November.
(2003/11/21)
JG2XA will stop from 0750JST on Sep. 6, 2003 to 0130JST on Sep. 8, 2003 due to AC power stop.
(2003/9/5)
Automatic data upload from the Oarai RX site started on Aug. 20, 2003
(2003/8/21)
Relationship between the uplink accessibility to Cubesat-Xi and geophysical conditions (ionsopheric, magnetic and HFD)
(2003/7/20)
Report on the near-by field strength around the Chofu TX site (summary)
(2003/7/26)
Report on the near-by field strength around the Chofu TX site
(2003/7/25 revised)
English homepage starts!
(2003/7/15)
Add 5 and 10 MHz receivers to the Sugadaira RX site and data are available from June 27, 2003
(2003/7/13)
Automatic data upload from the Kure RX site started on June 19, 2002
(2003/6/22)
Report on the near-by field strength around the Chofu TX site (indoor part)
(2003/6/23)
Automatic data upload from the Kure RX site started on June 19, 2003
(2003/6/22)
Report on the near-by field strength around the Chofu TX site (photos)
(2003/6/22)
Report on the near-by field strength around the Chofu TX site (outdoor part)
(2002/6/21)
The system used for measuring the near-by field strength around the Chofu TX site
(2002/6/12)
Add the UEC-related HFD references to HFD references as an indepent grouping
(2003/6/8)
Doppler-shift and intensity-decreases associated with the 2003/4/23 solar-flare event
(2003/5/1)
Re-start the 5006kHz transmission on April 14, 2003
(2003/4/14)
HF Doppler Observation Report[Sugadaira]
(2003/4/9: New data added)
A new HFD Observation site is established in Kure on March 24, 2003.
(2003/3/31)
JG2XA5006kHz stop due to TX failure from March 29, 2003.(2003/3/29-)
The HF Doppler News, No.26, is issued on March 19, 2003.
(2003/2/29)
HF Doppler Observation Report[Sugadaira]
(2003/3/17: New data added)
Report on the electromagnetic field intensity around JG2TX antenna.
(2002/2/15)
HF Doppler Observation Report[Sugadaira]
(2003/2/5: New data added)
HFD Observation Site List
(2003/1/28: renew)
Number of toppage aceesses passed 1000
(2003/1/28)
HF Doppler Observation Report[Sugadaira]
(2003/1/15: New data added)
Test observation report of the new frequency receiver at Sugadaira
(2002/1/15)
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