Table 1.

Repeatability estimates from the Yan16 experiment for above-ground biomass (AGB), the two LiDAR biomass indices (3D vegetation index (3DVI) and 3D profile index (3DPI)), normalized difference vegetation index (NDVI), and crop height derived from the LiDAR. The date of each sampling event is indicated as well as the dates of phenological growth stages (GS) 31 and 45 (as attained by 50% of entries). For 90% of the lines, GS65 ranged from 22-Sep to 13-Oct (median GS65 date was 28-Sep). For AGB sampled at GS65, entries were sampled on the actual date they reached anthesis (or within two days of); therefore, the lines were sampled on different dates and date is denoted “various.” Correspondingly, the values of 3DVI, 3DPI, NDVI, and height were interpolated between individual sampling events (i.e., 15-Sep, 25-Sep, 21-Oct, and 25-Oct) for the GS65 date of each entry.

Date	GS	AGB	3DVI	3DPI	NDVI	Height
8-Aug	31	0.36	0.88	0.90	0.85	0.89
16-Aug	—	—	0.78	0.87	0.83	0.81
22-Aug	—	—	0.68	0.79	0.61	0.84
6-Sep	45	—	0.69	0.82	0.62	0.90
15-Sep	—	—	0.70	0.78	0.39	0.90
25-Sep	—	—	0.77	0.79	0.54	0.92
Various	65	0.60	0.82	0.84	0.83	0.94
21-Oct	—	—	0.73	0.66	0.66	0.91
25-Oct	—	—	0.66	0.63	0.63	0.91