...
Choose Data Access -> List experiments from either of the two Madrigal sites listed above.
- If this is the first time you have used Madrigal, you will be redirected to a page where you set up a cookie with your name, email, and affiliation. Madrigal does not require passwords, but your data downloading is logged based on your cookie. When you have finished with that form, again choose Data Access -> List experiments.
- Use "Use all Madrigal sites" selected so you search over all Madrigal sites.
- For "Instrument category" choose "Incoherent Scatter Radars".
- Briefly look through the list of incoherent scatter radars for which there is data on Madrigal.
- Select the "Millstone Hill IS Radar", and for a time period choose February 2018. Then hit "List experiments".
- You will notice that every time period is repeated four times. There are copies on the same experiment both on the CEDAR site and the Millstone site. For each experiment, there is also the standard processing, and alternate processing that you can ignore for now.
- Choose the standard version of the Feb 6, 2018 experiment from the CEDAR site with experiment name "Wide Coverage East Azimuth Scan and Regional Vector Experiment". If the background blue color disappears, you have accidentally selected the Millstone Madrigal 2 site - hit the back button and try again.
- Click on the "Select file" pull-down menu. You will notice there are numerous different files associated with this experiment. This is explained in detail in the Millstone Hill overview document. Basically there is a combined file, and then smaller files with subsets of that combined files, along with derived velocity files and a gridded file where complex measurements are reduced to a standard grid for use by modelers. For now choose the "Combined basic parameters file" listed first.
- Choose the "Show Plots" button. This will list all the plots and other documentation the instrument principal investigator added to Madrigal to help users understand the data. For this experiment, choose "Summary plots - electron density".
- In this experiment, the Millstone Hill was looking in a number of directions 1) zenith, 2) 45 elevation, azimuth 135, 3) 45 elevation, azimuth 45. Finally, the radar was also scanning across a range of azimuths with a constant elevation of 6 degrees. If you are familiar with Google Earth or install the Google Earth plug in on your browser, you can see this scan's data displayed in a Google Earth environment.