## 4 Results of Space Objects Measurement Campaigns
In Figure 11, the results of the all validation measurement campaigns are summarized. In particular, the whole known RCS observed objects are indicated considering their measured slant-range as a function of their RCS. Analyzing the results (Figure 11), it is possible to see that the smaller object (ID object 39427 with a RCS of 0.1199 m\({}^{2}\)), indicated with a red point, was detected at a slant-range of about 1500 km (1540.158 km, to be exact, as reported in Table 2). This represents a great result, for the BIRALET radar, which demonstrates its high performances in small space debris observations with RCS lesser than 1 m\({}^{2}\). This aspect is confirmed by 6 other objects with RCS lesser than 1 m\({}^{2}\) (see Table 2 and Figure 11), detected at distances between about 1400 and 2000 km. \begin{table}
\begin{tabular}{c c c c c c c} \hline
**UTC Pipach** & **Object ID–Object Name** & **RCS (m)** & **Estimated Slant-Range** & **Measured Slant-Range** & **Estimated Doppler Shift** & **Measured Doppler Shift** \\
**(H)** & & & & **(dm)** & **(dm)** & **(dfa)** & **(dfa)** \\ \hline
2019/12/12 13 90754 & 16791 & 7.36 & 1418.99 & 1414.89 & 1418.88 & 7973 & 7970 \\
2019/12/13 953/25 & 36508 & 2.97 & 1799.41 & 1709.48 & 5235 & 5230 \\
2019/12/13 0506.06 & 4135 & 5 & 1724.34 & 1724.27 & -2988 & -2930 \\
2019/12/13 103:03:38 & 40697 & 3.4 & 1798.96 & 1798.92 & -7929 & -7980 \\
2019/12/13 104:54 & 37387 & 5.6 & 1940.76 & 1940.68 & -1712 & -1740 \\
2019/12/13 105:98 & 40694 & 3.7 & 1512.92 & 1512.75 & -4622 & -4660 \\
2019/12/13 115:16 & 5995 & 1 & 1500.75 & 1500.82 & 2800 & 2810 \\
2019/12/13 115:26 & 11962 & 5 & 1784.94 & 1784.90 & 3163 & 3160 \\
2019/12/13 115:43 & 35038 & 6.7 & 2287.48 & 2287.42 & 2537 & 2540 \\
2019/12/16 132:02 & 207600-MBC Labazzi 0.46 & 1949.85 & 1949.83 & 8512 & 8550 \\
2020/01/16 1342:00 & 207600-MBC Labazzi 0.46 & 1949.85 & 1949.83 & 8512 & 8550 \\
2020/01/16 149:29 & 934727-RTRTON-1.0 & 0.12 & 1540.22 & 1540.15 & 4387 & 4430 \\
2020/01/16 151:51:91 & 28759-TSLAN-1.0 & 0.33 & 1756.27 & 1756.36 & 8676 & 8710 \\
2020/01/16 155:01 & 40136-LIME QUAD 0.31 & 1776.41 & 1763.31 & 41 & 60 \\
2020/01/16 155:04 & 93900-CONSB-2493 & 0.68 & 1558.13 & 1575.99 & 10,696 & 10,740 \\
2020/01/16 169:01 & 41798-DRGCRANT PMIA 0.45 & 1451.96 & 1451.76 & -21 & 17 \\
2020/01/01 009:05:02 & 24203-FOCADazzi 2.8 & N/A & 2208.11 & 2208.23 & 15,175 & 15,200 \\
2020/01/01 009:05:03:30 & 46242-FOCADazzi-3.2 & N/A & 2208.08 & 2208.07 & 15,172 & 15,200 \\
2020/01/02 024/02 30:36:36 & 39433-SWANDA C 2.41 & 1382.71 & 1382.62 & 1200 & 1200 \\
2020/02/04 204/02 30:36:30 & 41596-FOCAT-C2.4 & 2.16 & 1641.41 & 1641.31 & 12,444 & 12,440 \\
2020/04 24 204:10:36 & 34024-FOCADazzi 3.57 & 5.34 & 1297.84 & 1297.14 & -5732 & -5860 \\
2020/04 24 104:17:24 & 30821-PLFThe most distant object was detected at a slant-range of about 2600 km (2624.938 km as listed in Table 2). It is the object with ID object 1328 and a RCS of 2.16 m\({}^{2}\) and it is highlighted with a yellow point in Figure 11.  
The rest of the observed objects has RCSs from 1 m\({}^{2}\) to about 12 m\({}^{2}\) and they were detected at distances between about 1200 and 2400 km. Figure 11: Results of the measurement campaigns between 13 December 2019 and 9 October 2020: distance of the detected objects as a function of its radar cross section. Figure 10: Spectrogram of the passage for the object ID 37387, detected by the BIRALET radar on 13 December 2019.