SAML-IU , LHZ-00


Noise Levels at Different Periods

The table below gives the decibel 10% noise level (in db) for each month in several period bands. The 10% noise level is defined as the signal level not exceeded 10% of the time, based on hourly measurements. Each entry in the table is color coded with reference to the New Low Noise Model (NLNM, Peterson, 1993):
navy, -6 db < value-NLNM < -3 db
blue, -3 db < value-NLNM < 3 db
aqua, 3 db < value-NLNM < 6 db
lime, 6 db < value-NLNM < 9 db
yellow, 9 db < value-NLNM < 12 db
orange, 12 db < value-NLNM < 15 db
red, 15 db < value-NLNM < 20 db
fuchsia, 20 db < value-NLNM < 25 db
silver, value-NLNM < -6 db, value-NLNM > 25 db

Black indicates that there was an insufficient number of hourly measurements to calculate a noise level.

Noise levels (PSD) in decibels
Month Chan. Qual. # obs. 518s 439s 373s 316s 268s 228s 193s 164s 139s 118s 100s 85s 72s 61s 52s 44s 37s 32s 27s 23s 19s 16s 14s 12s 10s
202504 LHZ-00 AR 711 -162 -165 -167 -170 -171 -172 -174 -175 -175 -177 -178 -179 -180 -181 -181 -181 -181 -179 -176 -170 -161 -156 -156 -155 -150
202503 LHZ-00 AR 737 -161 -163 -166 -167 -169 -171 -172 -174 -175 -176 -177 -179 -180 -181 -181 -181 -180 -178 -175 -169 -161 -156 -156 -154 -150
202502 LHZ-00 AR 672 -161 -163 -165 -167 -169 -170 -171 -172 -174 -175 -177 -178 -180 -180 -180 -180 -179 -178 -174 -169 -162 -157 -155 -153 -149
202501 LHZ-00 AR 744 -162 -165 -167 -169 -171 -172 -173 -175 -176 -177 -178 -179 -181 -182 -181 -181 -180 -178 -175 -169 -162 -156 -154 -154 -150
202412 LHZ-00 AR 744 -162 -165 -167 -169 -170 -172 -173 -174 -175 -176 -178 -179 -181 -181 -181 -181 -181 -179 -177 -172 -163 -157 -157 -154 -152
202411 LHZ-00 AR 720 -162 -165 -168 -169 -171 -173 -173 -175 -176 -177 -178 -180 -181 -181 -182 -182 -181 -180 -178 -173 -164 -158 -157 -156 -154
202410 LHZ-00 AR 722 -162 -165 -168 -169 -171 -173 -173 -175 -176 -177 -178 -179 -180 -181 -181 -182 -181 -180 -177 -172 -164 -158 -156 -155 -153
202409 LHZ-00 AR 720 -165 -167 -170 -172 -173 -175 -176 -176 -177 -179 -179 -180 -181 -182 -182 -182 -181 -180 -178 -174 -166 -159 -157 -156 -155
202408 LHZ-00 AR 248 -164 -166 -170 -171 -173 -174 -175 -176 -178 -179 -180 -181 -182 -182 -183 -183 -182 -180 -178 -174 -165 -157 -157 -158 -156
202311 LHZ-00 AR 33 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
202310 LHZ-00 AR 276 -162 -165 -168 -168 -170 -172 -173 -175 -175 -176 -177 -179 -180 -181 -181 -180 -180 -178 -175 -170 -162 -155 -152 -153 -150
202309 LHZ-00 AR 720 -162 -165 -168 -169 -171 -172 -173 -175 -175 -176 -178 -179 -181 -181 -182 -181 -181 -179 -177 -173 -165 -157 -155 -155 -153
202308 LHZ-00 AR 624 -164 -166 -169 -170 -172 -173 -174 -175 -176 -178 -179 -180 -181 -182 -182 -182 -181 -179 -176 -172 -164 -158 -157 -157 -152
202307 LHZ-00 AR 744 -160 -163 -166 -167 -169 -171 -172 -173 -174 -176 -177 -178 -179 -180 -180 -181 -180 -178 -175 -171 -163 -159 -158 -157 -153
202306 LHZ-00 AR 670 -155 -156 -157 -159 -158 -158 -158 -157 -157 -157 -159 -160 -161 -162 -162 -162 -162 -160 -158 -153 -146 -140 -139 -140 -139
201909 LHZ-00 AR 4 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
201908 LHZ-00 AR 61 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999
201906 LHZ-00 AR 145 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201905 LHZ-00 AR 488 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201904 LHZ-00 AR 289 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201812 LHZ-00 AR 451 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201811 LHZ-00 AR 699 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201810 LHZ-00 AR 709 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201809 LHZ-00 AR 660 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201808 LHZ-00 AR 741 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201807 LHZ-00 AR 592 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10 -10
201806 LHZ-00 AR 720 -173 -175 -176 -177 -178 -178 -179 -179 -179 -180 -180 -181 -182 -182 -182 -182 -181 -180 -177 -171 -163 -157 -155 -156 -154
201805 LHZ-00 AR 744 -173 -175 -176 -177 -178 -179 -180 -179 -180 -180 -181 -181 -182 -182 -183 -182 -182 -180 -177 -172 -165 -158 -157 -157 -154
201804 LHZ-00 AR 720 -173 -175 -176 -177 -178 -179 -179 -179 -179 -180 -180 -181 -182 -182 -182 -182 -181 -180 -177 -173 -166 -159 -156 -155 -151
201803 LHZ-00 AR 744 -173 -175 -176 -177 -177 -178 -179 -179 -180 -180 -181 -181 -182 -182 -182 -182 -181 -179 -176 -171 -163 -156 -152 -153 -149
201802 LHZ-00 AR 669 -173 -175 -176 -177 -178 -178 -179 -180 -180 -180 -180 -181 -182 -182 -182 -182 -181 -179 -176 -171 -163 -157 -154 -153 -150
201801 LHZ-00 AR 744 -172 -174 -175 -177 -177 -178 -178 -179 -179 -180 -180 -181 -182 -182 -182 -182 -181 -179 -176 -170 -162 -157 -156 -154 -150