## 5 Conclusions  
This work presents an assessment of the interferometric coherence with two different spaceborne SAR instruments: the L-band SAOCOM-1 and the C-band Sentinel-1, focusing on the study of forested areas. In both cases, this assessment has considered different parameters such as the spatial baseline, the temporal baseline, and the forest canopy height. In particular, this study has considered the analysis of short temporal baseline spaceborne, L-band interferograms. The results presented in this work show that the SAOCOM-1 L-band instrument appears to be more suitable than the Sentinel-1 C-band system for forest studies, due to the fact that interferometric data shows higher coherence values and data are also less sensitive to the temporal decorrelation. Additionally, SAOCOM-1 presents the possibility of acquiring fully polarimetric data, unlike Sentinel-1. These factors are critical for the feasibility of mapping forest canopy height by means of the InSAR or PolInSAR techniques. On the other hand, Sentinel-1 showed not only very low coherence values in both sites, but also little variation in relation to the analyzed parameters. This is probably explained by the fact that C-Band data present fewer penetration capabilities and are much more affected by temporal decorrelation than L-band data in forested areas. The high variability of the perpendicular baseline in SAOCOM-1, compared to Sentinel-1, has a strong influence on the interferometric coherence and, as already exposed in Section 2.1, it is also an important factor to define the system sensitivity to forest canopy height. In this assessment, we have had to account for the effect of this variable, since in many cases it determines the difference in the coherence between different pairs, making it difficult to achieve good or ideal experimental conditions. In the future, this may lead to better or worse scenarios for forest canopy height mapping, either with InSAR only or PolInSAR techniques. Nevertheless, as discussed in Section 4.5, this might allow experimenting with multiple baseline values in places with high heterogeneity in forest stand heights. Regardless of the limitations that need to be considered, this work demonstrates that the Argentinean constellation SAOCOM-1 yields a promising scenario for forest mapping, especially considering that it operates a spaceborne L-band SAR system, which can provide images every 8 days; something that had not been achieved before with other orbital SAR L-band missions. The exploratory assessment carried out in this work is a starting point for the development of case studies where PolInSAR is applied to invert forest canopy height from SAOCOM data, going beyond the traditional InSAR technique that has been assessed for the Argentinean constellation in [5]. Figure 19: Ratio of GEDI Canopy Height and \(Z_{2\pi}\) (\(h/HoA\)) vs. \(|\gamma|\) in Corrientes and Neuquen Sites. Finally, it is important to mention that we have considered two forest areas in Argentina comprising essentially managed forests, where ground-truth data were available, demonstrating the potential of SAOCOM-1 for forest studies based on InSAR and PolInSAR techniques. The generalisation of these results to other types of forests, such as boreal, tropical, or Mediterranean forests, is a foremost task, especially regarding the future L-band SAR missions ROSE-L and NISAR. We are confident that very similar performances can be expected in these types of forests. Conceptualization, S.A.S. and C.L.-M.; methodology, S.A.S. and C.L.-M.; software, S.A.S. ; validation, S.A.S. ; formal analysis, S.A.S. and C.L.-M.; investigation, S.A.S. and C.L.-M.; resources, S.A.S. and M.J.J. ; data curation, S.A.S. and M.J.J. ; writing--original draft preparation, S.A.S. and C.L.-M.; writing--review and editing, S.A.S. and C.L.-M.; visualization, S.A.S. and C.L.-M.; supervision, C.L.-M.; project administration, C.L.-M.; funding acquisition, C.L.-M. All authors have read and agreed to the published version of the manuscript.