Instruments:mui
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MU IS Radar Drift Measurements
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ACKNOWLEDGMENTS
- The MU radar belongs and is operated by the Radio Atmospheric Science Center of Kyoto University.
Instrument/Model Description
The Incoherent Scatter routine measurement with the MU (Middle and Upper atmosphere) radar (34.8N, 136.1E) uses 4 beam directions simultaneously, with the first 15 minutes of each hour devoted to single-pulse measurements (for electron density), and the last 45 minutes devoted to two-pulse (for ion drift velocity) or four-pulse (for ion/electron temperature) measurements. The radar operates at a frequency of 46.5 MHz and uses a beam width of 3.7 degrees. Measurements have been taken about 2 days per month starting on September 17, 1986.
The 4 beams are at an elevation angle of 70 degrees pointing towards magnetic north, east, south and west, assuming a declination angle of -5 degrees. The inclination angle is about 48 degrees, and the corrected magneitc latitude of the MU radar is about 25 degrees.
The initial range resolution of the velocities is 38 km. Velocities are averaged between 220 and 455 km, where the altitude of the measurement is defined to be 338, the midpoint of the 235 km range. A running 3-hour average of the ACF is computed as well as the height average before the line of sight (los) ion drift velocity is computed, so there are no error bars. The UT time is the midpoint of the 45 minutes of the middle hour.
Summary plots of the ion drifts in the perpendicular east, north and parallel directions are plotted in 4 separate 2-day plots per page. The data for 1986-1995 were submitted by Tomoyuki Takami, and revised data in 2004 (not yet in the DB) by Seiji Kawamura (s-kawamura@nict.go.jp).
References
References for the instrument and data processing procedures are:
S. Fukao et al., The MU radar with an active phased array system, 1, Antenna and power amplifiers, Radio Sci., vol 20, pp 1155-1168, 1985.
S. Fukao et al., The MU radar with an active phased array system, 2, In-house equipment, Radio Sci., vol 20, pp 1169-1176, 1985.
T. Sato et al., Ionospheric incoherent scatter measurements with the middle and upper atmosphere radar: Techniques and capability, Radio Sci., vol 24, pp 85-98, 1989.
Summary Plots for MU IS Radar Ion Drifts
- 1986 September 17-18, October 06-07,27-28,29-30 All data for this period
- 1986 November 06-07, December 01-02, 16-17,18-19 All data for this period
- 1987 January 28-29,30-31, March 30-31, April 01-02 All data for this period
- 1987 April 03-04, 23-24, 27-28, 29-30 All data for this period
- 1987 May 25-26, 27-28, June 01-02, 03-04 All data for this period
- 1987 June 05-06, October 19-20, 21-22, November 17-18 All data for this period
- 1987 November 19-20, 24-25, 26-27, December 17-18 All data for this period
- 1987-1988 December 21-22, 23-24, January 12-13, 14-15 All data for this period
- 1988 January 18-19, 20-21, 22-23, February 08-09 All data for this period
- 1988 February 10-11, March 13-14, 15-16, 17-18 All data for this period
- 1988 May 30-31, June 13-14, 15-16, July 12-13 All data for this period
- 1988 July 14-15, August 01-02, 03-04, September 12-13 All data for this period
- 1988 September 14-15, October 11-12, 17-18, November 08-09 All data for this period
- 1988 November 10-11, December 03-04, 05-06, 07-08 All data for this period
- 1988-1989 December 09-10, 11-12, January 09-10, 11-12 All data for this period
- 1989 February 13-14, 15-16, March 06-07, 08-09 All data for this period
- 1989 April 10-11, 12-13, May 08-09, 10-11 All data for this period
- 1989 May 29-30, 31-Jun 01, August 01-02, 03-04 All data for this period
- 1989 August 28-29, 30-31, September 01-02, October 02-03 All data for this period
- 1990 October 04-05, December 12-13, 14-15, 1989, January 23-24 All data for this period
- 1990 January 25-26, February 19-20, 21-22, March 19-20 All data for this period
- 1990 March 21-22, April 23-24, 25-26, May 24-25 All data for this period
- 1990 June 25-26, 27-28, July 23-24, 25-26 All data for this period
- 1990 September 25-26, 27-28, October 22-23, 24-25 All data for this period
- 1990-1991 December 17-18, 19-20, January 08-09, 10-11 All data for this period
- 1991 February 12-13, 14-15, March 19-20, 21-22 All data for this period
- 1991 April 09-10, 11-12, 30-May 01, 02-03 All data for this period
- 1991 June 11-12, 13-14, July 09-10, 11-12 All data for this period
- 1991 August 19-20, 21-22, September 10-11, 12-13 All data for this period
- 1991 October 07-08, 09-10, November 05-06, 07-08 All data for this period
- 1991-1992 December 03-04, 05-06, 1991, January 27-28, 29-30 All data for this period
- 1992 February 25-26, 27-28, March 24-25, 26-27 All data for this period
- 1992 March 31-Apr 01, 02-03, May 11-12, 13-14 All data for this period
- 1992 June 02-03, 04-05, July 21-22, 23-24 All data for this period
- 1992 August 18-19, 20-21, September 28-29, 30-Oct 01 All data for this period
- 1992 October 26-27, 28-29, November 24-25, 26-27 All data for this period
- 1992-1993 December 08-09, 10-11, February 08-09,10-11 All data for this period
- 1993 April 26-27, June 14-15, 16-17, July 27-28 All data for this period
- 1993 July 29-30, September 19-20, 21-22, October 18-19 All data for this period
- 1993 October 20-21, November 08-09, 10-11, December 06-07 All data for this period
- 1994 January 10-11, 12-13, February 07-08, 09-10 All data for this period
- 1994 March 14-15, 16-17, April 12-13, 14-15 All data for this period
- 1994 May 09-10, 11-12, June 06-07, 08-09 All data for this period
- 1994 July 11-12, 13-14, August 07-08, 09-10 All data for this period
- 1994-1995 October 03-04, 05-06, January 23-24,25-26 All data for this period
- 1995 February 28-March 01, 02-03, April 26-27, 28-29 All data for this period
- 1995 September 26-27, 28-29, October 23-24, 25-26 All data for this period
- 1995 November 18-19, 20-21, 22-23 All data for this period
Other IS Radars
Daily Listing for IS/HF Radars
-Revised 20 Oct 2006 by Barbara Emery
