<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-05-18 -138 22:00:00.000"
URSICode="SMK29"
StationName="Santa Maria"
GeoLatitude="-29.69"
GeoLongitude="307.81"
Source="Ionosonde"
SourceType="DPS-4D"
ScalerType="auto">
<SystemInfo UMLStationID="129">
<FrequencyStepping StartFrequency="2.0" StopFrequency="20.0">
<LinearStepping Step="0.025" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="2.5" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.49 Confidence: 50% PACIFIC flags: F2 cusps do not match, Unidentified traces above foF2</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.05.18 (138) 22:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.56" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-41.22" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-15.99" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="75.82641" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202613805182200001291296E02000002520000000001107201000080205120000B05040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.783" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="13.242" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.175" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.175" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.275" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="250.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.355" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.175" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.175" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="242.199" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="225.160" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.405" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="24.398" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.848" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="13.101" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="23.020" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.730" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.175 3.2 3.225 3.25 3.275 3.3 3.325 3.35 3.375 3.4 3.425 3.45 3.475 3.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 240.000 245.000 247.500 250.000 253.876 258.363 263.619 269.860 277.391 286.659 298.342 313.526 334.063
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 75 66 66 66 0 0 0 0 0 0 72 60 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
3.125 3.125 3.125 -3.125 3.125 -3.125 -3.125 -3.125 -3.125 3.125 -3.125 -3.125 -3.125 -3.125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="352">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.479 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 140.33333 141.0 142.0 143.0 144.0 145.0 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 170.66667 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 242.199 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.21274796 0.23456676 0.25338078 0.26972085 0.28399044 0.29649425 0.30745694 0.31704158 0.32537395 0.3325526 0.33865085 0.34372702 0.34782642 0.35098237 0.35322 0.35455588 0.355 0.35488647 0.35447052 0.3538294 0.35289052 0.3517334 0.35028866 0.34863752 0.34664166 0.3443862 0.3418129 0.33900848 0.3358523 0.33243608 0.32865313 0.3246013 0.32019037 0.3154074 0.31030762 0.30478683 0.29882607 0.29240817 0.28559488 0.27828085 0.27036867 0.26188183 0.25272647 0.242866 0.23219135 0.22059116 0.20804341 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2017033 0.20681319 0.21192308 0.21703297 0.22214286 0.22725275 0.23236264 0.23747253 0.24258241 0.2476923 0.2528022 0.2579121 0.26302198 0.26813188 0.27324176 0.27835163 0.28346154 0.28857142 0.29368132 0.2987912 0.3039011 0.30901098 0.3141209 0.31923077 0.32434067 0.32945055 0.33456045 0.33967033 0.3447802 0.3498901 0.355 0.39036182 0.43282896 0.48227453 0.53771496 0.5978321 0.6615562 0.72823375 0.7976696 0.8699121 0.9451896 1.023819 1.1062059 1.1927552 1.283903 1.3801064 1.4816761 1.5889119 1.7018229 1.8201904 1.9433771 2.0702376 2.1991508 2.3280926 2.454875 2.5774305 2.6939623 2.8031788 2.9042528 2.9967747 3.0806403 3.1559684 3.223015 3.2820504 3.3334248 3.3774273 3.4143474 3.4444335 3.467889 3.4848735 3.495512 3.4998765 3.5 3.4987388 3.4937274 3.4850814 3.4729967 3.4576695 3.4392955 3.418068 3.3941777 3.3678112 3.3391514 3.3083754 3.275655 3.241157 3.205041 3.1674604 3.1285625 3.0884879 3.04737 3.0053358 2.9625063 2.918995 2.8749094 2.830351 2.7854147 2.7401896 2.6947591 2.6492014 2.6035883 2.5579877 2.5124621 2.467069 2.4218616 2.3768892 2.332197 2.2878256 2.243813 2.2001932 2.156997 2.1142523 2.0719845 2.0302155 1.9889653 1.9482514 1.9080889 1.8684913 1.8294697 1.7910337 1.7531914 1.7159487 1.679311 1.6432817 1.6078632 1.5730568 1.538863 1.5052807 1.4723086 1.4399444 1.4081849 1.3770264 1.3464646 1.3164948 1.2871114 1.2583088 1.2300807 1.2024207 1.1753218 1.148777 1.122779 1.0973202 1.0723927 1.0479889 1.0241007 1.0007198 0.9778383 0.95544773 0.93354 0.9121066 0.8911393 0.87062985 0.8505698 0.830951 0.8117651 0.793004 0.77465945 0.75672346 0.7391881 0.7220453 0.70528734 0.68890643 0.6728949 0.65724516 0.64194983 0.62700146 0.6123929 0.59811693 0.5841665 0.5705348 0.5572149 0.5442001 0.53148395 0.51905984 0.5069214 0.4950625 0.48347694 0.47215867 0.46110186 0.45030066 0.43974942 0.42944258 0.41937461 0.40954024 0.39993414 0.39055124 0.3813865 0.3724349 0.36369172 0.3551522 0.34681162 0.33866557 0.33070955 0.3229392 0.31535032 0.3079387 0.3007003 0.29363117 0.28672734 0.27998507 0.27340057 0.26697028 0.26069057 0.254558 0.24856912 0.24272062 0.23700927 0.23143186 0.22598527 0.2206665 0.21547253 0.21040049 0.20544754 0.20061088 0.19588782 0.19127572 0.18677196 0.18237403 0.17807946 0.17388582 0.16979077 0.16579199 0.16188724 0.15807432 0.15435106 0.15071538 0.14716522 0.14369859 0.1403135 0.13700807 0.13378043 0.13062873 0.12755123 0.12454615 0.121611804 0.11874653 0.115948714 0.11321676 0.11054913 0.10794431 0.10540082 0.10291723 0.10049213 0.09812413 0.0958119 0.093554124 0.091349535 0.08919686 0.087094896 0.08504244 0.08303834 0.081081435 0.07917064 0.077304855 0.075483024 0.073704116 0.07196712 0.070271045 0.06861493 0.06699783 0.06541884 0.063877046 0.062371586 0.060901597 0.059466247 0.058064718 0.056696214 0.055359956 0.054055188 0.052781165 0.051537167 0.05032248

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.355" PeakHeight="110.0" Num="3" Error="0.0">
-18.827 2.45 -0.144
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.355" EndFrequency="3.5" PeakHeight="242.199" Num="5" zHalfNm="225.16" Error="1.781">
-43.018 3.38 -2.392 1.357 -0.526
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="12" EarthRadius="6370.0">
<QuasiParabolic ID="0" StartDistance="6460.0205" EndDistance="6480.001" A="-5.5333978E11" B="1.70783872E8" C="-13177.643" Error="0.00177"/>
<QuasiParabolic ID="1" StartDistance="6480.0" EndDistance="6510.333" A="-1.66367314E11" B="5.1347936E7" C="-3961.906" Error="0.00153"/>
<QuasiParabolic ID="2" StartDistance="6510.333" EndDistance="6540.667" A="0.0" B="276.64728" C="-0.002477261" Error="0.00452"/>
<QuasiParabolic ID="3" StartDistance="6540.667" EndDistance="6542.0" A="-1.36689418E12" B="4.1780336E8" C="-31926.283" Error="0.00817"/>
<QuasiParabolic ID="4" StartDistance="6542.0" EndDistance="6570.0" A="6.3965405E10" B="-1.9634606E7" C="1506.7623" Error="0.0197"/>
<QuasiParabolic ID="5" StartDistance="6570.0" EndDistance="6572.0" A="1.08225207E13" B="-3.29468954E9" C="250749.9" Error="0.0"/>
<QuasiParabolic ID="6" StartDistance="6572.0" EndDistance="6577.0" A="1.11839313E13" B="-3.4046743E9" C="259117.6" Error="0.00647"/>
<QuasiParabolic ID="7" StartDistance="6577.0" EndDistance="6579.0" A="1.15740456E13" B="-3.52330445E9" C="268136.16" Error="4.12E-4"/>
<QuasiParabolic ID="8" StartDistance="6579.0" EndDistance="6584.0" A="1.72017341E13" B="-5.2341079E9" C="398156.16" Error="0.00407"/>
<QuasiParabolic ID="9" StartDistance="6584.0" EndDistance="6591.0" A="3.6703998E13" B="-1.11582464E10" C="848045.2" Error="0.00917"/>
<QuasiParabolic ID="10" StartDistance="6591.0" EndDistance="6597.0" A="2.99788109E13" B="-9.1175281E9" C="693234.25" Error="0.013"/>
<QuasiParabolic ID="11" StartDistance="6597.0" EndDistance="6612.199" A="-4.1483697E13" B="1.2547625E10" C="-948811.6" Error="0.00604"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="91.0" Depth="0.155"/>
<TopsideChapman PeakHeight="242.199" PeakDensity="151985.11" PeakScaleHeight="13.101" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
