<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-20 -110 06:40:00.000"
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="15.0">
<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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.49 Confidence: 100%</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.20 (110) 06:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.56" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-41.20" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-15.98" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="78.74007" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202611004200640001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.675" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.687" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="9.864" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.325" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.325" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="2.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="252.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="252.500" 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="0.075" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="2.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="280.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.325" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.325" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="248.323" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="232.451" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.130" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="22.631" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.468" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="11.967" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="22.910" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.050" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="15">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.325 2.35 2.375 2.4 2.425 2.45 2.475 2.5 2.525 2.55 2.575 2.6 2.625 2.65 2.675
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
252.500 255.000 257.500 260.000 262.500 262.500 265.000 267.500 270.000 272.500 277.500 280.000 286.667 292.660 299.845
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 0 75 75 66 69 75 72 66 63 0 0 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 10.9375 1.5625 1.5625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="331">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 141.0 142.0 143.0 143.25 144.0 145.0 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 176.5 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 209.75 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 248.323 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.21213934 0.23390245 0.2526677 0.26895854 0.28319094 0.29565945 0.30659118 0.31614733 0.32445762 0.331616 0.33769703 0.34275886 0.34684667 0.3499937 0.352225 0.3535571 0.354 0.3538872 0.35354906 0.35306174 0.352277 0.35134757 0.35012823 0.34869877 0.34706512 0.34523398 0.343142 0.34080055 0.3382224 0.33542153 0.33234677 0.3290187 0.32545936 0.32156938 0.31744388 0.31299958 0.30822688 0.30312735 0.29771414 0.29194102 0.28570086 0.27913103 0.27213752 0.26456448 0.256557 0.2479685 0.23874018 0.22879031 0.21807829 0.20660281 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 0.2 0.2 0.2 0.20231579 0.20694737 0.21157895 0.21621053 0.22084211 0.22547369 0.23010527 0.23473684 0.23936842 0.244 0.24863158 0.25326315 0.25789472 0.2625263 0.26715788 0.27178946 0.27642104 0.28105262 0.2856842 0.29031578 0.29494736 0.29957893 0.3042105 0.3088421 0.31347367 0.31810525 0.32273683 0.3273684 0.332 0.33663157 0.34126315 0.34589472 0.3505263 0.354 0.36401376 0.40534183 0.4489092 0.49488413 0.54342747 0.59468716 0.64876145 0.705751 0.7656974 0.828648 0.8945871 0.9634553 1.0351962 1.109635 1.1866182 1.2658793 1.347144 1.430054 1.514208 1.5991738 1.6844538 1.7695335 1.8538684 1.9369012 2.0180361 2.0966983 2.1723216 2.244376 2.3122919 2.3756063 2.4338167 2.486524 2.5333323 2.5738983 2.6079364 2.635193 2.6554804 2.6686547 2.6746213 2.675 2.6741738 2.670021 2.6625454 2.651943 2.6384108 2.6221447 2.603337 2.5821779 2.558852 2.5335393 2.5064132 2.4776418 2.4473858 2.4157987 2.3830276 2.3492115 2.3144827 2.2789657 2.242778 2.2060301 2.1688254 2.1312604 2.0934253 2.055404 2.017274 1.979107 1.9409696 1.9029224 1.8650215 1.8273178 1.7898582 1.7526847 1.7158356 1.6793455 1.6432452 1.6075624 1.5723217 1.5375446 1.50325 1.4694544 1.436172 1.4034146 1.3711921 1.3395128 1.308383 1.2778076 1.2477901 1.2183324 1.1894358 1.1610998 1.1333234 1.1061046 1.0794404 1.0533272 1.0277607 1.0027362 0.9782481 0.95429057 0.9308573 0.90794164 0.8855366 0.8636349 0.842229 0.8213113 0.8008738 0.7809085 0.7614073 0.742362 0.7237643 0.7056058 0.68787825 0.67057323 0.65368253 0.6371977 0.6211105 0.6054127 0.5900963 0.575153 0.5605749 0.5463541 0.5324827 0.518953 0.5057574 0.49288836 0.48033848 0.46810052 0.45616722 0.4445316 0.4331867 0.42212573 0.411342 0.40082896 0.39058015 0.3805893 0.37085024 0.36135685 0.35210326 0.34308362 0.33429226 0.32572362 0.3173722 0.30923274 0.3013 0.29356888 0.28603438 0.27869165 0.27153596 0.2645626 0.25776705 0.2511449 0.24469176 0.23840345 0.2322758 0.2263048 0.22048649 0.21481705 0.20929271 0.2039098 0.19866475 0.19355409 0.1885744 0.18372236 0.17899475 0.1743884 0.16990022 0.16552722 0.16126648 0.1571151 0.15307033 0.14912945 0.14528981 0.1415488 0.13790393 0.13435274 0.13089283 0.12752186 0.124237575 0.12103774 0.1179202 0.114882834 0.11192361 0.10904051 0.1062316 0.10349496 0.10082874 0.09823114 0.09570039 0.093234785 0.09083265 0.08849235 0.0862123 0.083990954 0.081826806 0.07971838 0.07766425 0.075663015 0.07371332 0.07181383 0.06996327 0.06816037 0.0664039 0.06469268 0.06302555 0.061401352 0.059818998 0.05827741 0.056775533 0.05531235 0.053886864 0.052498106 0.051145125

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="2.675" PeakHeight="248.323" Num="5" zHalfNm="232.451" Error="0.525">
-38.518 -0.099 -0.073 0.119 -0.002
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="8" EarthRadius="6370.0">
<QuasiParabolic ID="0" StartDistance="6460.0205" EndDistance="6480.001" A="-5.5027394E11" B="1.69837632E8" C="-13104.63" Error="0.0016"/>
<QuasiParabolic ID="1" StartDistance="6480.0" EndDistance="6513.25" A="-1.37420415E11" B="4.2413708E7" C="-3272.5374" Error="0.00164"/>
<QuasiParabolic ID="2" StartDistance="6513.25" EndDistance="6546.5" A="0.0" B="2876.108" C="-0.40155023" Error="0.0554"/>
<QuasiParabolic ID="3" StartDistance="6546.5" EndDistance="6577.0" A="4.3962071E9" B="-1450988.1" C="119.101814" Error="0.0554"/>
<QuasiParabolic ID="4" StartDistance="6577.0" EndDistance="6579.0" A="1.25177587E12" B="-3.80766688E8" C="28955.63" Error="8.42E-4"/>
<QuasiParabolic ID="5" StartDistance="6579.0" EndDistance="6584.0" A="9.6514909E12" B="-2.93425946E9" C="223019.53" Error="0.0739"/>
<QuasiParabolic ID="6" StartDistance="6584.0" EndDistance="6608.0" A="1.20367675E13" B="-3.65882726E9" C="278044.44" Error="0.0657"/>
<QuasiParabolic ID="7" StartDistance="6608.0" EndDistance="6618.323" A="-3.33369804E13" B="1.00741468E10" C="-761072.9" Error="0.00906"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="99.75" Depth="0.154"/>
<TopsideChapman PeakHeight="248.323" PeakDensity="88779.47" PeakScaleHeight="11.967" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
