Instruments:cht

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Chatanika IS Radar

The incoherent scatter transmitter station at Chatanika, Alaska (65.1N, 147.4W) operated between 1971 and 1982. It was moved to Sondrestrom in 1982-1983, where it has been in operation since 1983. There are generally 7 record types (KINDAT) for each Chatanika experiment that are usually inputs or outputs to a program called VAST, which calculates electric fields, vector velocities and conductivities. VAST assumes the velocity field varies linearly with time. Data from five positions are used to find the three line-of-sight velocities at the time of the middle observation. Full error propagation, including covariance terms, is included. The density and temperature data are combined to obtain a spatial average for the time of the middle observation.

In addition, several criterea involving the least squares fit, as well as relative absolute uncertainties, have been examined to determine whether the derived F-region vector velocities are converted to electric fields, and the good values are height integrated to find the best possible estimate of the electric field. Starting in the D-region, the averaged electron densities are used to calculate the conductivities. The calculation has been improved to explicitly include the ion-neutral collision frequencies and to include a model atmosphere.

There are 4 areas in the summary plots. There are image plots as a function of height and time of the electron density, electron temperature, and ion temperature. The ion drift near 300 km is plotted in the perpendicular east, north and parallel directions. There are 2 days per page. For the image plots, the data above 60 degrees elevation is averaged over 30 minutes. The height bin is 6 km for the electron density, which is power channel data from the center position used as input to VAST (KINDAT=5101 or 5102). The electron density has been both calibrated and corrected for temperature effects. The height bin for the electron and ion temperatures is 40 km. The temperatures plotted are derived paramaters from the OAC (old auto-correlator, KINDAT=15013) and are outputs from VAST.

Summary Plots for Chatanika IS Radar

Aug 11-Aug 12, 1976 All data for this period
Dec 22-Dec 23, 1976 All data for this period
Feb 15-Feb 16, 1977 All data for this period
Mar 15-Mar 16, 1977 All data for this period
Apr 19-Apr 20, 1977 All data for this period
May 18-May 19, 1977 All data for this period
Jun 16-Jun 17, 1977 All data for this period
Nov 23-Nov 24, 1977 All data for this period
Jan 18-Jan 19, 1978 All data for this period
Feb 08-Feb 09, 1978 All data for this period
Mar 08-Mar 09, 1978 All data for this period
Apr 12-Apr 13, 1978 All data for this period
May 10-May 11, 1978 All data for this period
Jun 07-Jun 08, 1978 All data for this period
Jul 12-Jul 13, 1978 All data for this period
Aug 01-Aug 02, 1978 All data for this period
Sep 06-Sep 07, 1978 All data for this period
Oct 18-Oct 19, 1978 All data for this period
Dec 13-Dec 14, 1978 All data for this period
Feb 14-Feb 15, 1979 All data for this period
Mar 21-Mar 22, 1979 All data for this period
Apr 18-Apr 19, 1979 All data for this period
Jun 20-Jun 21, 1979 All data for this period
Oct 17-Oct 18, 1979 All data for this period
Nov 21-Nov 22, 1979 All data for this period
Dec 19-Dec 20, 1979 All data for this period
Jan 16-Jan 17, 1980 All data for this period
Feb 13-Feb 14, 1980 All data for this period
Mar 19-Mar 20, 1980 All data for this period
Apr 16-Apr 17, 1980 All data for this period
May 14-May 15, 1980 All data for this period
Jun 11-Jun 12, 1980 All data for this period
Jul 09-Jul 10, 1980 All data for this period
Aug 13-Aug 14, 1980 All data for this period
Sep 10-Sep 11, 1980 All data for this period
Oct 08-Oct 09, 1980 All data for this period
Oct 10-Oct 11, 1980 All data for this period
Oct 12-Oct 13, 1980 All data for this period
Oct 22-Oct 23, 1980 All data for this period
Nov 12-Nov 13, 1980 All data for this period
Dec 10-Dec 11, 1980 All data for this period
Jan 14-Jan 15, 1981 All data for this period
Feb 04-Feb 05, 1981 All data for this period
Mar 04-Mar 05, 1981 All data for this period
Apr 01-Apr 02, 1981 All data for this period
May 13-May 14, 1981 All data for this period
Jul 14-Jul 15, 1981 All data for this period
Jul 16-Jul 17, 1981 All data for this period
Sep 30-Oct 01, 1981 All data for this period
Oct 28-Oct 29, 1981 All data for this period
Nov 18-Nov 19, 1981 All data for this period
Dec 15-Dec 16, 1981 All data for this period
Dec 17-Dec 18, 1981 All data for this period
Jan 19-Jan 20, 1982 All data for this period
Feb 16-Feb 17, 1982 All data for this period