Statistical investigation of gravity wave characteristics in the ionosphere

Earth, Planets and Space

Table 1 Basic statistical values of selected GW parameters for periods 2014/7–2015/6 (solar maximum) and 2018/9–2019/8 (solar minimum)

Year	GW parameter	Mean L–O mode	σ L–O mode	Skew L–O mode	Mean R–X mode	σ R–X mode	Skew R–X mode
2014/7–2015/6	v_o (m/s)	153	75	4.1	149	62	4.2
2018/9–2019/8	v_o (m/s)	122	41	1.1	114	36	1.1
2014/7–2015/6	v (m/s)	191	78	4.0	184	66	3.9
2018/9–2019/8	v (m/s)	154	40	0.7	143	35	0.7
2014/7–2015/6	\({\epsilon}\)_o (°)	− 31	16	− 0.2	− 30	16	− 0.4
2018/9–2019/8	\({\epsilon}\)_o (°)	− 51	12	0.3	− 53	13	0.6
2014/7–2015/6	\({\epsilon}\) (°)	− 24	13	− 0.5	− 24	13	− 0.5
2018/9–2019/8	\({\epsilon}\) (°)	− 37	10	− 0.6	− 39	11	− 0.4
2014/7–2015/6	T (min)	17	6	1.3	17	6	1.4
2018/9–2019/8	T (min)	18	7	0.8	18	6	0.9
2014/7–2015/6	λ (km)	197	129	4.3	188	110	5.3
2018/9–2019/8	λ (km)	167	94	1.8	156	79	2.0