Jicamarca Radio Observatory
Incoherent Scatter Data Base

Jicamarca F-region ExB drifts data exhibited at this site were collected during the 1994 MISETA I Campaign and World Day Experiments conducted since November 1995. Data processing scheme is described in Kudeki et al. [1997].

First select a date from the pull-down menu, and then click on one of the display action buttons:

• To make use of this data base you need a JavaScript compatible browser such as Netscape 3.0 or Internet Explorer 3.02 (or later versions).
• Upward and east- and west-beam line-of-sight ExB velocities are referred to as `w', `w_e', and `w_w', respecively. Eastward drift velocity computed from w_e and w_w is denoted as `u'. Two independent reception antennas are used per beam direction. Consequently, four power estimates `p_w0', `p_w1', `p_e0', and `p_e1' are available. The term `power' refers to `signal+noise' normalized by our estimate of the channel noise level. For all the estimates integration time is 5 min and height resolution is 15 km.
• Statistical uncertainties (StDev) for parameter estimates are provided whenever possible. A NaN or 0 value for StDev means that uncertainty estimate is not available. For drift estimates a StDev value of NaN implies that radar returns were due to coherent (e.g., spread-F, electrojet, space junk...) rather than incoherent scatter.
• If you open any of the data maps as an `xv' display (`open this image' option when you click your right mouse button will this for you if your browser has been set to handle gif files with xv command), `color editor' of your `xv' application (click on xv-display and look under `windows' menu) will allow you to view the data map with a variety of color schemes.
• Binary data files `xxx.bin' can be downloaded from data directories by clicking on file names. The directories also include copies of CEDAR Data Base files `xxx.dat' written in ASCII. Contact Erhan Kudeki (tel: 217 333 4153) for information on file formats.

Acknowledgements. We thank the staff and engineers of Jicamarca Radio Observatory for their help with the radar observations. The Observatory is operated by the Geophysical Institute of Peru, Ministry of Education, with support from the National Science Foundation of the United States. This work is supported by the Division of Atmospheric Sciences of the National Science Foundation through grant ATM 94-24361 to the University of Illinois.