I'm checking altitude data for every minute and stored in data logger,in this the value is not constant when I fix it on my desk for testing, so say no movement. variation of value increases upto +- 20m difference. I use Reference pressure is 101.325 kPa (Sea Level).
Need Suggestion how to maintain accuracy standard as +- 0.2 meter as mentioned in sensor specification.
My data is
date & altitude
11/19/2015 15:29 920.51
11/19/2015 15:30 920.51
11/19/2015 15:31 920.51
11/19/2015 15:32 920.42
11/19/2015 15:33 920.42
11/19/2015 15:34 919.783
11/19/2015 15:35 919.873
11/19/2015 15:36 919.691
11/19/2015 15:37 918.963
11/19/2015 15:38 919.418
11/19/2015 15:39 919.327
11/19/2015 15:40 919.873
11/19/2015 15:41 919.236
11/19/2015 15:42 919.145
11/19/2015 15:43 919.236
11/19/2015 15:44 918.69
11/19/2015 15:45 918.963
11/19/2015 15:46 919.236
11/19/2015 15:47 918.417
11/19/2015 15:48 919.145
11/19/2015 15:49 918.417
11/19/2015 15:50 918.872
11/19/2015 15:51 918.872
11/19/2015 15:52 918.781
11/19/2015 15:53 918.053
11/19/2015 15:54 918.872
11/19/2015 15:55 919.236
11/19/2015 15:56 919.327
11/19/2015 15:57 918.781
11/19/2015 15:58 919.054
11/19/2015 15:59 918.872
11/19/2015 16:00 919.145
11/19/2015 16:01 918.872
11/19/2015 16:02 918.508
11/19/2015 16:03 919.054
11/19/2015 16:04 919.054
11/19/2015 16:06 918.872
11/19/2015 16:05 918.144
11/19/2015 16:07 918.417
11/19/2015 16:08 919.236
11/19/2015 16:09 918.326
11/19/2015 16:10 918.235
11/19/2015 16:11 918.144
11/19/2015 16:12 918.417
11/19/2015 16:13 917.962
11/19/2015 16:14 917.143
11/19/2015 16:15 917.78
11/19/2015 16:16 917.962
11/19/2015 16:17 918.144
11/19/2015 16:18 917.871
11/19/2015 16:19 917.507
11/19/2015 16:20 917.78
11/19/2015 16:21 917.325
11/19/2015 16:22 917.234
11/19/2015 16:23 917.78
11/19/2015 16:24 916.688
11/19/2015 16:25 916.506
11/19/2015 16:26 916.597
11/19/2015 16:27 916.233
11/19/2015 16:28 915.96
11/19/2015 16:29 916.233
11/19/2015 16:30 916.142
11/19/2015 16:31 915.869
11/19/2015 16:32 915.778
11/19/2015 16:33 915.596
11/19/2015 16:34 916.233
11/19/2015 16:35 915.869
11/19/2015 16:36 915.687
11/19/2015 16:37 916.142
11/19/2015 16:38 915.869
11/19/2015 16:39 915.414
11/19/2015 16:40 915.687
11/19/2015 16:41 915.96
11/19/2015 16:42 915.323
11/19/2015 16:43 915.869
11/19/2015 16:44 914.868
11/19/2015 16:45 915.505
11/19/2015 16:46 915.05
11/19/2015 16:47 915.232
11/19/2015 16:48 915.05
11/19/2015 16:49 914.777
11/19/2015 16:50 915.414
11/19/2015 16:51 914.686
11/19/2015 16:52 914.596
11/19/2015 16:53 915.232
11/19/2015 16:54 914.868
11/19/2015 16:55 915.141
11/19/2015 16:56 915.141
11/19/2015 16:57 915.141
11/19/2015 16:58 915.323
11/19/2015 16:59 914.959
11/19/2015 17:00 914.322
11/19/2015 17:01 914.959
11/19/2015 17:02 914.777
11/19/2015 17:03 914.868
11/19/2015 17:04 914.777
11/19/2015 17:05 914.504
11/19/2015 17:06 914.231
11/19/2015 17:07 914.504
11/19/2015 17:08 914.414
11/19/2015 17:09 914.231
11/19/2015 17:10 914.231
11/19/2015 17:11 914.141
11/19/2015 17:12 914.141
11/19/2015 17:13 913.867
11/19/2015 17:14 914.596
11/19/2015 17:15 914.141
11/19/2015 17:16 913.867
11/19/2015 17:17 913.686
11/19/2015 17:18 913.231
11/19/2015 17:19 913.504
11/19/2015 17:20 913.867
11/19/2015 17:21 913.867
11/19/2015 17:22 913.594
11/19/2015 17:23 913.049
11/19/2015 17:24 912.321
11/19/2015 17:25 913.14
11/19/2015 17:26 912.049
11/19/2015 17:27 912.321
11/19/2015 17:28 911.503
11/19/2015 17:29 911.866
11/19/2015 17:30 911.503
11/19/2015 17:31 911.139
11/19/2015 17:32 910.593
11/19/2015 17:33 910.775
11/19/2015 17:34 910.411
11/19/2015 17:35 910.321
11/19/2015 17:36 909.956
11/19/2015 17:37 909.956
11/19/2015 17:38 910.048
11/19/2015 17:39 909.593
11/19/2015 17:40 908.138
11/19/2015 17:41 908.411
11/19/2015 17:42 907.956
11/19/2015 17:43 907.956
11/19/2015 17:44 908.138
11/19/2015 17:45 907.32
11/19/2015 17:46 908.229
11/19/2015 17:47 907.684
11/19/2015 17:48 907.502
11/19/2015 17:49 907.411
11/19/2015 17:50 906.774
11/19/2015 17:51 907.32
11/19/2015 17:52 907.411
11/19/2015 17:53 907.411
11/19/2015 17:54 907.138
11/19/2015 17:55 906.865
11/19/2015 17:56 906.593
11/19/2015 17:57 906.229
11/19/2015 17:58 905.683
11/19/2015 17:59 906.138
11/19/2015 18:00 905.047
11/19/2015 18:01 906.047
11/19/2015 18:02 905.138
11/19/2015 18:03 905.047
11/19/2015 18:04 904.684
11/19/2015 18:05 904.593
11/19/2015 18:06 904.32
11/19/2015 18:07 904.774
11/19/2015 18:08 904.411
11/19/2015 18:09 904.593
11/19/2015 18:10 904.593
11/19/2015 18:11 904.138
11/19/2015 18:12 904.956
11/19/2015 18:13 903.684
11/19/2015 18:14 903.957
11/19/2015 18:15 904.048
11/19/2015 18:17 904.048
11/19/2015 18:18 903.229
11/19/2015 18:19 903.229
11/19/2015 18:20 903.229
11/19/2015 18:21 903.139
11/19/2015 18:22 903.32
11/19/2015 18:23 902.684
11/19/2015 18:24 902.775
11/19/2015 18:25 902.957
11/19/2015 18:26 902.684
11/19/2015 18:27 903.048
11/19/2015 18:28 902.957
11/19/2015 18:29 902.139
11/19/2015 18:30 902.684
11/19/2015 18:31 902.684
11/19/2015 18:32 902.775
11/19/2015 18:33 902.593
11/19/2015 18:34 902.412
11/19/2015 18:38 902.866
11/19/2015 18:36 902.957
11/19/2015 18:37 902.957
11/19/2015 18:43 901.412
11/19/2015 18:40 902.321
11/19/2015 18:41 901.867
11/19/2015 18:42 901.776
11/19/2015 18:46 901.231
11/19/2015 18:45 901.867
11/19/2015 18:47 901.867
11/19/2015 18:48 901.231
11/19/2015 18:49 901.14
11/19/2015 18:50 900.776
