<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-20 -110 06:35:00.000"
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: 90% PACIFIC flags: One of F2 cusps was derived from the other</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.20 (110) 06:35:00</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">
FF202611004200635001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.725" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.551" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="9.677" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.125" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="247.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="247.500" 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="0.125" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="2.525" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="275.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="257.154" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="234.596" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.161" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="32.220" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.686" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="17.374" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="30.240" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.800" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="28">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.05 2.075 2.1 2.125 2.15 2.175 2.2 2.225 2.25 2.275 2.3 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 2.7 2.725
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
247.500 248.125 248.750 249.375 250.000 251.818 253.636 255.455 257.273 259.091 260.909 262.727 264.545 266.364 268.182 270.000 267.500 270.000 272.500 275.000 280.000 284.372 289.288 294.856 301.214 308.544 317.088 327.174
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 0 0 0 78 0 0 0 0 0 0 0 0 0 0 63 69 81 75 66 66 63 0 0 0 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 1.5625 -1.5625 -1.5625 -1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 -1.5625 7.8125 1.5625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="419">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 141.0 142.0 142.08333 143.0 144.0 145.0 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 174.16667 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 206.25 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 257.154 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0 464.0 465.0 466.0 467.0 468.0 469.0 470.0 471.0 472.0 473.0 474.0 475.0 476.0 477.0 478.0 479.0 480.0 481.0 482.0 483.0 484.0 485.0 486.0 487.0 488.0 489.0 490.0 491.0 492.0 493.0 494.0 495.0 496.0 497.0 498.0 499.0 500.0 501.0 502.0 503.0 504.0 505.0 506.0 507.0
</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 0.35298675 0.3521277 0.3511249 0.34983355 0.34833378 0.34655926 0.3445913 0.34229675 0.3398302 0.33706498 0.33401984 0.33071515 0.327109 0.32322994 0.31904808 0.31454307 0.3097052 0.30453598 0.29904887 0.29310012 0.2867813 0.2800439 0.2727352 0.26502842 0.25670934 0.24776544 0.23820302 0.22786881 0.21668318 0.20459439 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 0.204 0.2088 0.2136 0.2184 0.2232 0.228 0.2328 0.2376 0.2424 0.2472 0.252 0.2568 0.2616 0.2664 0.2712 0.276 0.2808 0.2856 0.2904 0.2952 0.3 0.3048 0.3096 0.3144 0.3192 0.324 0.3288 0.3336 0.3384 0.3432 0.348 0.3528 0.354 0.3751283 0.40642178 0.44092485 0.47807732 0.51733404 0.558246 0.6005324 0.6440682 0.68881536 0.7348296 0.7821803 0.8309983 0.88142914 0.9336115 0.9877063 1.0438789 1.1022625 1.1630013 1.2261977 1.29188 1.3600634 1.4306263 1.5033578 1.5779023 1.6537442 1.7302928 1.8067901 1.8824623 1.9565392 2.028301 2.0971565 2.1626463 2.2244456 2.282371 2.3363218 2.3862944 2.4323537 2.4745789 2.5130804 2.5479908 2.5794244 2.607515 2.6323688 2.6540961 2.6727915 2.688533 2.7013936 2.7114275 2.7186825 2.7231889 2.7249677 2.725 2.7243755 2.7220628 2.7181058 2.7125692 2.7055194 2.6970212 2.6871402 2.6759415 2.6634896 2.6498477 2.635079 2.6192448 2.602406 2.5846214 2.5659492 2.5464458 2.526166 2.5051632 2.483489 2.4611938 2.438326 2.4149323 2.3910577 2.3667457 2.3420382 2.316975 2.291595 2.2659345 2.2400289 2.213912 2.1876156 2.1611707 2.134606 2.1079493 2.0812266 2.0544634 2.0276828 2.0009074 1.9741579 1.9474547 1.9208161 1.8942597 1.8678024 1.8414594 1.8152453 1.7891736 1.7632571 1.7375076 1.711936 1.6865523 1.6613661 1.636386 1.61162 1.5870754 1.5627587 1.5386761 1.5148333 1.491235 1.4678857 1.4447895 1.4219499 1.3993698 1.377052 1.3549986 1.3332117 1.3116926 1.2904428 1.2694631 1.248754 1.228316 1.2081491 1.1882532 1.1686279 1.1492726 1.1301866 1.1113688 1.092818 1.0745332 1.0565127 1.038755 1.0212585 1.0040212 0.9870412 0.9703164 0.95384485 0.9376242 0.9216522 0.9059265 0.8904447 0.87520427 0.8602027 0.8454375 0.830906 0.81660545 0.8025333 0.7886868 0.7750633 0.76166 0.7484741 0.7355029 0.72274363 0.71019346 0.69784963 0.6857094 0.67377 0.66202855 0.6504824 0.6391288 0.627965 0.6169881 0.6061957 0.5955848 0.5851529 0.57489735 0.5648154 0.5549045 0.5451621 0.5355855 0.5261722 0.5169198 0.5078256 0.49888724 0.49010223 0.4814682 0.47298267 0.46464336 0.45644787 0.4483939 0.44047922 0.43270147 0.4250585 0.41754812 0.41016808 0.4029163 0.3957907 0.3887891 0.38190952 0.37514988 0.36850822 0.36198258 0.35557097 0.3492715 0.3430823 0.33700147 0.33102724 0.32515773 0.31939125 0.31372598 0.30816022 0.30269226 0.2973205 0.29204318 0.28685877 0.28176564 0.27676225 0.271847 0.26701844 0.26227504 0.25761533 0.25303784 0.2485412 0.24412398 0.2397848 0.23552233 0.23133521 0.22722213 0.22318181 0.219213 0.2153144 0.21148485 0.2077231 0.20402798 0.20039833 0.19683298 0.19333084 0.18989077 0.18651171 0.18319257 0.1799323 0.17672986 0.17358425 0.17049447 0.16745953 0.16447847 0.16155033 0.15867418 0.15584911 0.15307423 0.15034863 0.14767148 0.14504187 0.142459 0.13992204 0.13743016 0.13498259 0.13257852 0.13021721 0.12789787 0.12561978 0.12338221 0.12118443 0.119025744 0.116905466 0.114822894 0.11277738 0.110768266 0.1087949 0.106856644 0.10495288 0.103083 0.1012464 0.09944249 0.09767069 0.09593043 0.094221145 0.09254229 0.09089333 0.08927372 0.087682955 0.08612051 0.08458589 0.08307859 0.08159814 0.08014405 0.07871585 0.077313095 0.07593533 0.074582085 0.07325295 0.0719475 0.07066529 0.06940593 0.068169 0.0669541 0.06576084 0.064588845 0.06343772 0.062307112 0.06119664 0.060105957 0.0590347 0.057982534 0.056949116 0.05593411 0.054937184 0.053958025 0.05299631 0.052051734 0.05112399 0.05021278

</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="2.725" PeakHeight="257.154" Num="5" zHalfNm="234.596" Error="1.184">
-53.829 4.852 -3.081 1.678 -0.524
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="10" 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="6512.083" A="-1.47549225E11" B="4.5539884E7" C="-3513.7546" Error="0.00163"/>
<QuasiParabolic ID="2" StartDistance="6512.083" EndDistance="6544.167" A="0.0" B="-754.9205" C="0.15595233" Error="0.0149"/>
<QuasiParabolic ID="3" StartDistance="6544.167" EndDistance="6575.0" A="4.876585E10" B="-1.497926E7" C="1150.2948" Error="0.0149"/>
<QuasiParabolic ID="4" StartDistance="6575.0" EndDistance="6580.0" A="6.7795571E12" B="-2.06236826E9" C="156845.28" Error="0.019"/>
<QuasiParabolic ID="5" StartDistance="6580.0" EndDistance="6585.0" A="3.80722033E12" B="-1.15892237E9" C="88194.375" Error="0.00957"/>
<QuasiParabolic ID="6" StartDistance="6585.0" EndDistance="6589.0" A="6.5675555E12" B="-1.99729306E9" C="151851.97" Error="0.0064"/>
<QuasiParabolic ID="7" StartDistance="6589.0" EndDistance="6605.0" A="1.22672885E13" B="-3.72736819E9" C="283137.1" Error="0.0193"/>
<QuasiParabolic ID="8" StartDistance="6605.0" EndDistance="6610.0" A="-6.5479199E12" B="1.96989389E9" C="-148146.95" Error="6.29E-4"/>
<QuasiParabolic ID="9" StartDistance="6610.0" EndDistance="6627.154" A="-1.44567655E13" B="4.3628882E9" C="-329160.12" Error="4.83E-4"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="96.25" Depth="0.154"/>
<TopsideChapman PeakHeight="257.154" PeakDensity="92129.34" PeakScaleHeight="17.374" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
