IGC Spy

Glider UHW Thermal Info (Task 5-Sport)

		Thermal Time			Thermal Alt					Orbits Speed			Orbits Diam			Orbit Time			Climb Rate			Other
ID	Type	Start [hms]	End [hms]	Duration [hms]	Start [ft]	End [ft]	Delta [ft]	Lost [ft]	Lost [%]	Avg (stab) [kts]	Min (stab) [kts]	Max (stab) [kts]	Avg (stab) [m]	Min (stab) [m]	Max (stab) [m]	Avg (stab) [sec]	Min (stab) [sec]	Max (stab) [sec]	Avg (stab) [kts]	Min (stab) [kts]	Max (stab) [kts]	Direction	Track Length [km]	Count
0	All			01:00:22			32181	1417	4.4 %	62.2						29 00:00:31 blah			5.3					21
1	Thermal	02:53:00	02:56:45	00:03:45	5246	7801	2555	32	1.3 %	61.9 61.5	47.8 56.6	84.9 66.3	285 277	255 255	335 309	28.1 27.5	25 25	30 29	6.8 7.1	3.2 5.6	8.5 8.5	Right	7.2	8
1	Orbit	02:53:00	02:53:30	00:00:30	5246	5659	413	0	0 %	58.1			0			30			8.2			Right	0.9
2	Orbit	02:53:30	02:53:58	00:00:28	5659	6059	400	0	0 %	59.8			0			28			8.5			Right	0.9
3	Orbit	02:53:58	02:54:27	00:00:29	6059	6440	380	0	0 %	56.6			0			29			7.8			Right	0.8
4	Orbit	02:54:27	02:54:56	00:00:29	6440	6781	341	0	0 %	59.1			0			29			7			Right	0.9
5	Orbit	02:54:56	02:55:21	00:00:25	6781	7060	278	0	0 %	62.2			0			25			6.6			Right	0.8
6	Orbit	02:55:21	02:55:46	00:00:25	7060	7368	308	0	0 %	66.3			0			25			7.3			Right	0.9
7	Orbit	02:55:46	02:56:15	00:00:29	7368	7641	272	0	0 %	65.1			0			29			5.6			Right	1
8	Orbit	02:56:15	02:56:45	00:00:30	7641	7801	160	32	20.4 %	68.2			0			30			3.2			Right	1.1
2	Thermal	03:04:54	03:08:07	00:03:13	5853	7775	1922	0	0 %	65.3 63.8	51.6 61.4	86.7 65.9	295 291	243 243	331 324	27.6 27.8	23 23	30 30	6 6.3	4.3 5.7	7.7 7.7	Right	6.5	7
10	Orbit	03:04:54	03:05:20	00:00:26	5853	6108	255	0	0 %	65.6			0			26			5.8			Right	0.9
11	Orbit	03:05:20	03:05:50	00:00:30	6108	6397	288	0	0 %	65.4			0			30			5.7			Right	1
12	Orbit	03:05:50	03:06:19	00:00:29	6397	6679	282	0	0 %	61.9			0			29			5.8			Right	0.9
13	Orbit	03:06:19	03:06:49	00:00:30	6679	6968	288	0	0 %	65.9			0			30			5.7			Right	1
14	Orbit	03:06:49	03:07:12	00:00:23	6968	7267	298	0	0 %	64.6			0			23			7.7			Right	0.8
15	Orbit	03:07:12	03:07:39	00:00:27	7267	7572	305	0	0 %	61.4			0			27			6.7			Right	0.9
16	Orbit	03:07:39	03:08:07	00:00:28	7572	7775	203	0	0 %	72.2			0			28			4.3			Right	1
3	Thermal	03:20:10	03:22:04	00:01:54	4629	5062	433	147	34.1 %	64 62.8	56 62.8	73.2 62.8	398 339	339 339	499 339	38 33	33 33	48 33	2.6 3.3	-0.1 3.3	4.6 3.3	Mixed	3.8	3
18	Orbit	03:20:10	03:20:43	00:00:33	4629	4885	255	0	0 %	65.9			0			33			4.6			Left	1.1
19	Orbit	03:20:43	03:21:16	00:00:33	4885	5068	183	6	3.6 %	62.8			0			33			3.3			Left	1.1
20	Orbit	03:21:16	03:22:04	00:00:48	5068	5062	-6	141	-2150 %	63.4			0			48			-0.1			Right	1.6
4	Thermal	03:24:20	03:27:10	00:02:50	5141	6601	1459	9	0.7 %	58.4 58.3	49.7 57.7	69.6 59.3	326 283	262 262	415 302	34 29.7	27 27	42 32	5.1 5.4	4.1 4.8	6 6	Left	5.1	5
22	Orbit	03:24:20	03:25:02	00:00:42	5141	5518	377	6	1.7 %	60.3			0			42			5.3			Left	1.3
23	Orbit	03:25:02	03:25:32	00:00:30	5518	5761	242	0	0 %	57.8			0			30			4.8			Left	0.9
24	Orbit	03:25:32	03:25:59	00:00:27	5761	6010	249	0	0 %	59.3			0			27			5.5			Left	0.8
25	Orbit	03:25:59	03:26:31	00:00:32	6010	6332	321	0	0 %	57.7			0			32			6			Left	1
26	Orbit	03:26:31	03:27:10	00:00:39	6332	6601	269	3	1.2 %	57.1			0			39			4.1			Left	1.1
5	Thermal	03:30:45	03:31:52	00:01:07	5541	5997	456	39	8.6 %	63.5 58.7	51.8 58.7	76.1 58.7	228 298	76 298	311 298	22.3 31	7 31	31 31	3.9 3.6	3.6 3.6	4.6 3.6	Right	2.2	3
27	Orbit	03:30:45	03:31:14	00:00:29	5541	5767	226	0	0 %	65.5			0			29			4.6			Right	1
28	Orbit	03:31:14	03:31:45	00:00:31	5767	5954	187	26	14 %	58.7			0			31			3.6			Right	0.9
29	Orbit	03:31:45	03:31:52	00:00:07	5954	5997	42	13	30.8 %	66.2			0			07			3.6			Right	0.2
6	Thermal	03:31:57	03:33:11	00:01:14	6105	6266	160	229	142.9 %	64 64	52.2 64	84.3 64	776 776	776 776	776 776	74 74	74 74	74 74	1.3 1.3	1.3 1.3	1.3 1.3	Left	2.4	1
30	Orbit	03:31:57	03:33:11	00:00:00	6105	6266	160	229	142.9 %	64			1000			00			1.3			Left	2.4
7	Thermal	03:34:37	03:35:50	00:01:13	6499	7286	787	9	1.3 %	59 59	49.2 59	65.3 59	231 319	20 319	355 319	24.3 33	2 33	38 33	3.8 7.2	-1.9 7.2	7.2 7.2	Left	2.2	3
31	Orbit	03:34:37	03:35:15	00:00:38	6499	6889	390	0	0 %	57			0			38			6.1			Left	1.1
32	Orbit	03:35:15	03:35:48	00:00:33	6889	7293	403	3	0.8 %	59			0			33			7.2			Left	1
33	Orbit	03:35:48	03:35:50	00:00:02	7293	7286	-6	6	-100 %	60.9			0			02			-1.9			Left	0.1
8	Thermal	03:44:33	03:48:09	00:03:36	5252	7529	2276	36	1.6 %	59.4 57.6	49.8 56.2	77.2 59.6	264 236	221 221	359 254	27 25	23 23	34 27	6.3 6.8	4.5 5.5	7.8 7.8	Right	6.6	8
34	Orbit	03:44:33	03:45:05	00:00:32	5252	5557	305	22	7.5 %	65.2			0			32			5.6			Right	1.1
35	Orbit	03:45:05	03:45:31	00:00:26	5557	5797	239	0	0 %	59.6			0			26			5.5			Right	0.8
36	Orbit	03:45:31	03:45:54	00:00:23	5797	6082	285	0	0 %	59.6			0			23			7.4			Right	0.7
37	Orbit	03:45:54	03:46:18	00:00:24	6082	6358	275	3	1.2 %	56.3			0			24			6.8			Right	0.7
38	Orbit	03:46:18	03:46:43	00:00:25	6358	6617	259	0	0 %	56.2			0			25			6.1			Right	0.7
39	Orbit	03:46:43	03:47:08	00:00:25	6617	6912	295	0	0 %	56.4			0			25			7			Right	0.7
40	Orbit	03:47:08	03:47:35	00:00:27	6912	7270	357	0	0 %	57.4			0			27			7.8			Right	0.8
41	Orbit	03:47:35	03:48:09	00:00:34	7270	7529	259	9	3.8 %	64.5			0			34			4.5			Right	1.1
9	Thermal	03:58:54	04:02:10	00:03:16	5288	7093	1804	29	1.6 %	61 59.6	51.6 58.8	76.1 61.5	276 291	44 241	431 348	28 29.8	4 25	43 36	5.4 5.4	3.2 3.2	6.4 6.4	Left	6.1	7
42	Orbit	03:58:54	03:59:37	00:00:43	5288	5731	442	13	3 %	61.3			0			43			6.1			Left	1.4
43	Orbit	03:59:37	04:00:02	00:00:25	5731	5984	252	0	0 %	58.9			0			25			6			Left	0.8
44	Orbit	04:00:02	04:00:32	00:00:30	5984	6289	305	0	0 %	59.6			0			30			6			Left	0.9
45	Orbit	04:00:32	04:01:04	00:00:32	6289	6581	291	6	2.2 %	61.5			0			32			5.4			Left	1
46	Orbit	04:01:04	04:01:30	00:00:26	6581	6863	282	0	0 %	58.8			0			26			6.4			Left	0.8
47	Orbit	04:01:30	04:02:06	00:00:36	6863	7060	196	9	5 %	59			0			36			3.2			Left	1.1
48	Orbit	04:02:06	04:02:10	00:00:04	7060	7093	32	0	0 %	67.8			0			04			4.9			Left	0.1
10	Thermal	04:04:16	04:05:51	00:01:35	6312	6870	557	39	7.1 %	61.1 59.6	54.4 59.6	70.9 59.6	317 283	283 283	337 283	31.7 29	29 29	34 29	3.5 3.4	1.9 3.4	5.3 3.4	Right	3	3
49	Orbit	04:04:16	04:04:48	00:00:32	6312	6597	285	3	1.1 %	63.2			0			32			5.3			Right	1
50	Orbit	04:04:48	04:05:17	00:00:29	6597	6761	164	0	0 %	59.6			0			29			3.4			Right	0.9
51	Orbit	04:05:17	04:05:51	00:00:34	6761	6870	108	36	33.3 %	60.6			0			34			1.9			Right	1.1
11	Thermal	04:09:22	04:11:21	00:01:59	6361	7135	774	22	3 %	61.6 59.4	53.6 59.4	80.6 59.4	398 496	325 496	496 496	39.7 51	32 51	51 51	3.8 4.1	3.3 4.1	4.1 4.1	Mixed	3.8	3
52	Orbit	04:09:22	04:09:58	00:00:36	6361	6604	242	9	4.1 %	63.3			0			36			4			Left	1.2
53	Orbit	04:09:58	04:10:49	00:00:51	6604	6955	351	9	2.8 %	59.4			0			51			4.1			Right	1.6
54	Orbit	04:10:49	04:11:21	00:00:32	6955	7135	180	3	1.8 %	62			0			32			3.3			Right	1
12	Thermal	04:14:55	04:18:32	00:03:37	7066	8510	1443	301	20.9 %	67.5 65.5	56.3 62.2	91.6 67.5	293 324	111 290	407 407	27.1 30.2	8 28	37 37	3.2 4	-4.1 1.7	5.4 5.4	Right	7.4	8
56	Orbit	04:14:55	04:15:23	00:00:28	7066	7322	255	19	7.7 %	62.5			0			28			5.4			Right	0.9
57	Orbit	04:15:23	04:15:52	00:00:29	7322	7585	262	19	7.5 %	66			0			29			5.4			Right	1
58	Orbit	04:15:52	04:16:29	00:00:37	7585	7867	282	85	30.2 %	67.1			0			37			4.5			Right	1.3
59	Orbit	04:16:29	04:16:58	00:00:29	7867	8044	177	19	11.1 %	62.2			0			29			3.6			Right	0.9
60	Orbit	04:16:58	04:17:27	00:00:29	8044	8284	239	26	11 %	67.5			0			29			4.9			Right	1
61	Orbit	04:17:27	04:17:56	00:00:29	8284	8487	203	6	3.2 %	66.9			0			29			4.2			Right	1
62	Orbit	04:17:56	04:18:24	00:00:28	8487	8566	78	65	83.3 %	63.3			0			28			1.7			Right	0.9
63	Orbit	04:18:24	04:18:32	00:00:08	8566	8510	-55	59	-105.9 %	84.4			0			08			-4.1			Right	0.3
13	Thermal	04:28:24	04:32:25	00:04:01	6102	7578	1476	213	14.4 %	62.8 60.7	48 56.3	82 66.3	304 332	131 278	383 383	30.1 33.5	11 28	39 39	3.7 3.1	1.1 1.1	7.4 4.8	Right	7.6	8
65	Orbit	04:28:24	04:28:53	00:00:29	6102	6466	364	0	0 %	65.7			0			29			7.4			Right	1
66	Orbit	04:28:53	04:29:21	00:00:28	6466	6692	226	16	7.2 %	60.7			0			28			4.8			Right	0.9
67	Orbit	04:29:21	04:29:58	00:00:37	6692	6961	269	9	3.7 %	56.3			0			37			4.3			Right	1.1
68	Orbit	04:29:58	04:30:31	00:00:33	6961	7198	236	0	0 %	58			0			33			4.2			Right	1
69	Orbit	04:30:31	04:31:10	00:00:39	7198	7316	118	75	63.9 %	60			0			39			1.8			Right	1.2
70	Orbit	04:31:10	04:31:44	00:00:34	7316	7457	141	39	27.9 %	62.8			0			34			2.5			Right	1.1
71	Orbit	04:31:44	04:32:14	00:00:30	7457	7513	55	72	129.4 %	66.3			0			30			1.1			Right	1
72	Orbit	04:32:14	04:32:25	00:00:11	7513	7578	65	0	0 %	72.9			0			11			3.5			Right	0.4
14	Thermal	04:37:40	04:42:45	00:05:05	6446	8654	2208	85	3.9 %	59.8 58	50.2 55.5	81.6 60.4	324 371	12 340	430 430	33.9 39	1 36	45 45	3.1 3.9	-7.8 1.6	8.3 5.5	Left	9.2	9
73	Orbit	04:37:40	04:38:11	00:00:31	6446	6883	436	0	0 %	60.2			0			31			8.3			Left	1
74	Orbit	04:38:11	04:38:47	00:00:36	6883	7217	334	0	0 %	57.7			0			36			5.5			Left	1.1
75	Orbit	04:38:47	04:39:32	00:00:45	7217	7585	367	0	0 %	58.3			0			45			4.8			Left	1.3
76	Orbit	04:39:32	04:40:13	00:00:41	7585	7890	305	0	0 %	59.9			0			41			4.4			Left	1.3
77	Orbit	04:40:13	04:40:50	00:00:37	7890	8156	265	6	2.5 %	56.6			0			37			4.3			Left	1.1
78	Orbit	04:40:50	04:41:28	00:00:38	8156	8375	219	6	3 %	55.5			0			38			3.4			Left	1.1
79	Orbit	04:41:28	04:42:05	00:00:37	8375	8562	187	6	3.5 %	57.5			0			37			3			Left	1.1
80	Orbit	04:42:05	04:42:44	00:00:39	8562	8667	104	52	50 %	60.4			0			39			1.6			Left	1.2
81	Orbit	04:42:44	04:42:45	00:00:01	8667	8654	-13	13	-100 %	72.4			0			01			-7.8			Left	0
15	Thermal	04:48:24	04:50:53	00:02:29	6712	7962	1250	9	0.8 %	59.9 59.1	51.4 58.1	79.3 59.9	291 348	60 310	383 383	29.8 36	6 32	39 39	4.6 4.8	2.6 3.9	6.1 5.9	Left	4.6	5
82	Orbit	04:48:24	04:48:59	00:00:35	6712	7073	360	3	0.9 %	61.6			0			35			6.1			Left	1.1
83	Orbit	04:48:59	04:49:38	00:00:39	7073	7375	301	0	0 %	59.9			0			39			4.6			Left	1.2
84	Orbit	04:49:38	04:50:10	00:00:32	7375	7693	318	0	0 %	59.1			0			32			5.9			Left	1
85	Orbit	04:50:10	04:50:47	00:00:37	7693	7936	242	6	2.7 %	58.1			0			37			3.9			Left	1.1
86	Orbit	04:50:47	04:50:53	00:00:06	7936	7962	26	0	0 %	60.7			0			06			2.6			Left	0.2
16	Thermal	04:55:56	04:59:08	00:03:12	6364	8366	2001	52	2.6 %	64.9 63	49 59.3	84 65.2	290 316	57 246	447 447	27.4 30.6	5 23	42 42	6.6 6.3	4.1 4.1	8.9 7.6	Left	6.4	7
87	Orbit	04:55:56	04:56:30	00:00:34	6364	6709	344	36	10.5 %	70			0			34			6			Left	1.2
88	Orbit	04:56:30	04:56:53	00:00:23	6709	6938	229	0	0 %	65.2			0			23			5.9			Left	0.8
89	Orbit	04:56:53	04:57:20	00:00:27	6938	7283	344	0	0 %	64.5			0			27			7.6			Left	0.9
90	Orbit	04:57:20	04:57:54	00:00:34	7283	7709	426	0	0 %	60.9			0			34			7.4			Left	1.1
91	Orbit	04:57:54	04:58:21	00:00:27	7709	7998	288	0	0 %	59.3			0			27			6.3			Left	0.8
92	Orbit	04:58:21	04:59:03	00:00:42	7998	8290	291	16	5.6 %	65			0			42			4.1			Left	1.4
93	Orbit	04:59:03	04:59:08	00:00:05	8290	8366	75	0	0 %	69.5			0			05			8.9			Left	0.2
17	Thermal	05:05:07	05:08:19	00:03:12	7037	9173	2135	52	2.5 %	64.2 63	50.4 57.4	77.9 65.9	285 328	69 290	374 374	27.4 31.8	6 29	35 35	5.6 6.5	-2.9 4.9	9.4 7.9	Right	6.3	7
94	Orbit	05:05:07	05:05:34	00:00:27	7037	7463	426	0	0 %	63.4			0			27			9.4			Right	0.9
95	Orbit	05:05:34	05:06:06	00:00:32	7463	7890	426	0	0 %	57.4			0			32			7.9			Right	0.9
96	Orbit	05:06:06	05:06:35	00:00:29	7890	8264	374	0	0 %	61			0			29			7.6			Right	0.9
97	Orbit	05:06:35	05:07:10	00:00:35	8264	8661	396	6	1.7 %	65.3			0			35			6.7			Right	1.2
98	Orbit	05:07:10	05:07:44	00:00:34	8661	8963	301	13	4.3 %	65.3			0			34			5.3			Right	1.1
99	Orbit	05:07:44	05:08:13	00:00:29	8963	9202	239	3	1.4 %	65.9			0			29			4.9			Right	1
100	Orbit	05:08:13	05:08:19	00:00:06	9202	9173	-29	29	-100 %	70.6			0			06			-2.9			Right	0.2
18	Thermal	05:14:29	05:17:57	00:03:28	6653	8064	1410	32	2.3 %	62.2 61	51.5 60	71.8 62	260 293	35 272	324 324	26 29.3	3 27	33 33	3.4 3.9	-1.9 1.9	5.8 5.1	Right	6.5	8
101	Orbit	05:14:29	05:14:58	00:00:29	6653	6935	282	0	0 %	60.9			0			29			5.8			Right	0.9
102	Orbit	05:14:58	05:15:28	00:00:30	6935	7181	246	0	0 %	61.3			0			30			4.9			Right	0.9
103	Orbit	05:15:28	05:15:58	00:00:30	7181	7414	232	0	0 %	60.9			0			30			4.6			Right	0.9
104	Orbit	05:15:58	05:16:25	00:00:27	7414	7647	232	0	0 %	62			0			27			5.1			Right	0.9
105	Orbit	05:16:25	05:16:52	00:00:27	7647	7808	160	0	0 %	61.5			0			27			3.5			Right	0.9
106	Orbit	05:16:52	05:17:21	00:00:29	7808	7965	157	0	0 %	60.4			0			29			3.2			Right	0.9
107	Orbit	05:17:21	05:17:54	00:00:33	7965	8074	108	22	21.2 %	60			0			33			1.9			Right	1
108	Orbit	05:17:54	05:17:57	00:00:03	8074	8064	-9	9	-100 %	70.2			0			03			-1.9			Right	0.1
19	Thermal	05:22:58	05:28:09	00:05:11	6479	9826	3346	45	1.4 %	60.2 60.1	50.4 56.3	90.7 62.5	307 331	96 280	393 393	31.1 33.6	10 28	39 39	6.3 6.2	3.5 4.4	9.2 7.5	Left	9.6	10
109	Orbit	05:22:58	05:23:30	00:00:32	6479	6975	495	0	0 %	63			0			32			9.2			Left	1
110	Orbit	05:23:30	05:24:00	00:00:30	6975	7326	351	0	0 %	58.6			0			30			6.9			Left	0.9
111	Orbit	05:24:00	05:24:37	00:00:37	7326	7732	406	0	0 %	56.3			0			37			6.5			Left	1.1
112	Orbit	05:24:37	05:25:05	00:00:28	7732	8080	347	0	0 %	61			0			28			7.4			Left	0.9
113	Orbit	05:25:05	05:25:35	00:00:30	8080	8458	377	0	0 %	60.5			0			30			7.5			Left	0.9
114	Orbit	05:25:35	05:26:11	00:00:36	8458	8809	351	0	0 %	58.7			0			36			5.8			Left	1.1
115	Orbit	05:26:11	05:26:45	00:00:34	8809	9199	390	0	0 %	61.6			0			34			6.8			Left	1.1
116	Orbit	05:26:45	05:27:20	00:00:35	9199	9478	278	9	3.5 %	62.5			0			35			4.7			Left	1.1
117	Orbit	05:27:20	05:27:59	00:00:39	9478	9767	288	36	12.5 %	61.5			0			39			4.4			Left	1.2
118	Orbit	05:27:59	05:28:09	00:00:10	9767	9826	59	0	0 %	58.4			0			10			3.5			Left	0.3
20	Thermal	05:36:51	05:39:27	00:02:36	7742	9967	2224	19	0.9 %	61.9 60.7	50.6 59.7	68.7 61.2	317 301	290 290	344 310	31.2 30.3	29 29	33 31	8.4 8.6	8 8.1	8.9 8.9	Right	5	5
119	Orbit	05:36:51	05:37:23	00:00:32	7742	8202	459	0	0 %	64			0			32			8.5			Right	1.1
120	Orbit	05:37:23	05:37:54	00:00:31	8202	8667	465	0	0 %	61.1			0			31			8.9			Right	1
121	Orbit	05:37:54	05:38:23	00:00:29	8667	9064	396	0	0 %	61.2			0			29			8.1			Right	0.9
122	Orbit	05:38:23	05:38:54	00:00:31	9064	9524	459	0	0 %	59.7			0			31			8.8			Right	1
123	Orbit	05:38:54	05:39:27	00:00:33	9524	9967	442	19	4.4 %	63.6			0			33			8			Right	1.1
21	Thermal	05:46:57	05:48:46	00:01:49	8845	10341	1496	6	0.4 %	64.4 62.6	54.4 62.3	72.2 62.8	280 318	11 288	473 347	27.3 31	1 28	46 34	5.7 8.2	-1.9 8.1	8.3 8.2	Left	3.5	4
124	Orbit	05:46:57	05:47:43	00:00:46	8845	9491	646	3	0.5 %	62.7			0			46			8.3			Left	1.5
125	Orbit	05:47:43	05:48:11	00:00:28	9491	9878	387	0	0 %	62.8			0			28			8.2			Left	0.9
126	Orbit	05:48:11	05:48:45	00:00:34	9878	10344	465	0	0 %	62.3			0			34			8.1			Left	1.1
127	Orbit	05:48:45	05:48:46	00:00:01	10344	10341	-3	3	-100 %	69.6			0			01			-1.9			Left	0

Color of the track indicates climb rate
Width of the track indicates ground speed (not air speed)
Pink arrow indicates wind (not always reliable)
Fire indicates thermal source based on wind

IGC-SPY Gliders Competitions Flight LOG analysis (UHW)

Glider UHW Thermal Info (Task 5-Sport)

Color of the track indicates climb rate Width of the track indicates ground speed (not air speed) Pink arrow indicates wind (not always reliable) Fire indicates thermal source based on wind

Color of the track indicates climb rate
Width of the track indicates ground speed (not air speed)
Pink arrow indicates wind (not always reliable)
Fire indicates thermal source based on wind