Estimated values of missing sky radio brightness temperature observation using numerical method calculation

By employing the spline interpolation technique, we are successful in locating the missing value of the sky temperature, which we refer to as Tsky. This investigation made use of a sample of data that is taken from previous work that had been observed at 1.42 GHz using the radio telescope that is located at Baghdad University. For this study, we focused on missing elevations (0-15) degree since the telescope couldn't record data lower than 20 degrees because of the surrounding buildings. According to the findings of this research, we are able to point out that the estimated values of Tsky range from 21 K to 600 K at various azimuth degrees, which range from 120 degree to 220 degree.