# Estimating the Fractional Vegetation Cover from GLASS Leaf Area Index Product
## 4 Result Analysis
### Comparison with GEOV1 FCover Product
#### 4.1.2 Temporal Consistency  
Figure 6 shows the temporal FCover profiles to evaluate temporal consistency between the TRAGL and GEOV1 FCover products over several sites with different biome classes. The temporal FCover trajectories for the Zhangbei, Larzac, and Laprida sites with grass and cereal crop biome types are shown in Figure 6a. For the Zhangbei site, the TRAGL FCover values were slightly higher than the GEOV1 FCover values of nearly zero during the non-growing season, but the TRAGL FCover values were slightly smaller than the GEOV1 FCover values during the growing season. The GEOV1 FCover values for days 225, 236, and 358 were missing. The TRAGL FCover values were in agreement with the mean value of the high resolution FCover map. For the Larzac and Laprida sites, the GEOV1 FCover values were higher than those of TRAGL throughout the entire year in 2002. The TRAGL FCover values were slightly overestimated with values of 0.12 compared with the mean value of the high-resolution FCover map at the Larzac site, whereas the TRAGL FCover values became slight underestimates when compared to the mean value of the high resolution FCover map at the Laprida site. The temporal FCover profiles for the Demmin, Apilles2, and Barrax sites are shown in Figure 6b. The biome type for these sites is broadleaf crops. At these sites, the GEOV1 FCover values were larger than those of TRAGL, especially during the growing season, although some GEOV1 FCover values were missing. At the Demmin site, the GEOV1 FCover displays very high values up to 0.96 for days 155, 165, 175, and 185. However, the TRAGL FCover values demonstrated exceptionally good agreement with the mean values of the high resolution FCover maps. The absolute differences between the TRAGL FCover values and the mean values of the high resolution FCover maps were less than 0.05 at these sites. The temporal FCover trajectories for broadleaf forest sites are shown in Figure 6c. For the Counami site, most GEOV1 FCover values for 2001 are missing, whereas TRAGL FCover values have continuous trajectory. For the Cameron and Puechabon sites, TRAGL FCover profiles are in good agreement with those of GEOV1 in terms of seasonal patterns and absolute FCover values. For the Counami and Cameron sites, the TRAGL and GEOV1 FCover values are approximately constant for the entire year and present almost no seasonality as expected for these evergreen forests, which is consistent with the findings of [PERSON] _et al._[19]. The agreement of the TRAGL FCover values with the mean values of the high-resolution FCover maps is very good with overestimates less than 0.054 at these sites. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Month** & **GCC** & **SHB** & **SVN** & **EBF** & **DBF** & **ENF** & **DNF** \\ \hline Jan & 985,636 & 451,663 & 641,547 & 372,828 & 128,491 & 55,625 & 4510 \\ Feb & 1,025,756 & 451,616 & 641,364 & 357,647 & 122,924 & 78,354 & 788 \\ Mar & 1,178,315 & 455,838 & 648,645 & 364,684 & 153,906 & 85,715 & 2804 \\ Aprr & 1,350,668 & 458,903 & 690,889 & 374,780 & 231,431 & 219,956 & 11,055 \\ May & 1,397,863 & 588,449 & 895,854 & 360,526 & 253,126 & 325,827 & 85,608 \\ Jun & 1,456,798 & 1,058,810 & 946,856 & 357,754 & 251,286 & 336,228 & 88,049 \\ Jul & 1,524,155 & 1,094,476 & 930,176 & 362,374 & 246,499 & 339,242 & 88,050 \\ Aug & 1,501,161 & 1,094,436 & 904,858 & 368,948 & 245,460 & 337,507 & 88,050 \\ Sep & 1,555,865 & 1,094,892 & 942,266 & 391,350 & 250,847 & 340,780 & 88,050 \\ Oct & 1,470,197 & 866,052 & 944,379 & 401,671 & 253,335 & 341,358 & 87,477 \\ Nov & 1,383,669 & 486,386 & 729,848 & 380,965 & 235,894 & 242,110 & 21,725 \\ Dec & 1,161,229 & 454,034 & 654,806 & 360,736 & 173,795 & 87,783 & 6812 \\ \hline \hline \end{tabular} GCC = Grasses and cereal crops; SHB = Shrubs; BLC = Broadleaf crops; SVN = Savannah; EBF = Evergreen broadleaf forests; DBF = Deciduous broadleaf forests; ENF = Evergreen needleleaf forests; DNF = Deciduous needleleaf forests.  
\end{table}