Remote Sensing of Soil Moisture

Table 7

Root mean square errors associated with soil moisture retrieval from the PALS LVV, SVV, and LHH band combination. The errors generally increase with vegetation water content [41].

Calibration days	Note	VWC < 1.0	1 < VWC < 2.5	2.5 < VWC < 3.5	3.5 < VWC < 4.5	VWC > 4.5
178, 189	1 dry, 1 wet	0.0401	0.0340	0.0477	0.0447	0.0490
176, 186, 189	1 dry, 2 wet	0.0373	0.0286	0.0576	0.0551	0.0501
178, 188, 189	1 dry, 2 wet	0.0395	0.0293	0.0502	0.0439	0.0481
176, 178, 189	2 dry, 1 wet	0.0398	0.0319	0.0493	0.0443	0.0490
176, 178, 187	2 dry, 1 wet	0.0382	0.0340	0.0465	0.0450	0.0987
188, 189	2 wet	0.0571	0.1747	—	0.0443	0.0481
176, 178	2 dry	0.0421	0.0598	0.0497	—	—