<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-20 -110 04:35:00.000"
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: 100%</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.20 (110) 04:35:00</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">
FF202611004200435001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.575" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.805" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="9.797" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="2.925" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="0.075" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="2.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="256.199" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="231.079" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="213.533" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.393" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="25.016" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.478" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="13.391" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="24.370" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.370" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.0 2.025 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 227.500 227.500 230.000 230.000 232.500 232.500 235.000 235.000 237.500 240.000 241.667 243.333 245.000 246.667 248.333 250.584 253.178 256.199 259.764 264.034 269.239 275.726 284.034
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 66 69 63 63 81 81 78 81 69 66 0 0 0 0 0 63 81 81 69 66 69 66 63
</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 -7.8125 -1.5625 -1.5625 -1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 1.5625 -1.5625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="333">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 136.83333 137.0 138.0 139.0 140.0 141.0 142.0 143.0 144.0 145.0 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 163.66667 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 190.5 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 231.079 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0
</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 0.353812 0.35332385 0.35253775 0.3513833 0.34986797 0.34800196 0.34587008 0.3433416 0.34043694 0.33717975 0.3335292 0.3294542 0.3250611 0.3201454 0.31483623 0.30908883 0.30277678 0.29597685 0.28861925 0.2806141 0.2719544 0.2625736 0.25233817 0.24117032 0.22898808 0.2156547 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 0.20191304 0.20765217 0.2133913 0.21913044 0.22486956 0.2306087 0.23634782 0.24208696 0.24782608 0.25356522 0.25930434 0.26504347 0.27078262 0.27652174 0.28226086 0.288 0.29373914 0.29947826 0.3052174 0.3109565 0.31669566 0.32243478 0.3281739 0.33391306 0.33965218 0.3453913 0.35113043 0.354 0.3719192 0.41012418 0.45115167 0.49465853 0.54044056 0.58840495 0.63853514 0.69090176 0.74561125 0.8027796 0.86255586 0.9250714 0.9904407 1.058757 1.1300507 1.2042648 1.2812766 1.3607919 1.4424235 1.5256177 1.6096504 1.693759 1.7770208 1.8586013 1.9376352 2.0133963 2.0852592 2.1527538 2.2155213 2.2733464 2.3260767 2.3736615 2.4160821 2.4533625 2.4855611 2.5127246 2.5349224 2.5522044 2.5646207 2.5722063 2.574985 2.575 2.5738275 2.569981 2.563586 2.5547771 2.54369 2.530459 2.5152173 2.4980965 2.4792256 2.4587302 2.436733 2.4133527 2.3887048 2.3628998 2.336044 2.3082402 2.2795856 2.2501738 2.2200935 2.1894286 2.1582594 2.1266608 2.0947046 2.0624578 2.029983 1.9973395 1.9645824 1.9317635 1.8989307 1.8661288 1.8333992 1.8007803 1.7683073 1.7360132 1.7039276 1.672078 1.6404896 1.609185 1.5781847 1.5475076 1.5171704 1.487188 1.4575735 1.4283389 1.3994944 1.3710488 1.3430098 1.3153838 1.2881762 1.2613913 1.2350323 1.2091019 1.1836017 1.1585325 1.1338944 1.1096873 1.08591 1.0625608 1.0396379 1.0171387 0.9950602 0.9733992 0.95215213 0.931315 0.91088367 0.89085364 0.87122035 0.85197884 0.8331242 0.81465125 0.79655474 0.77882916 0.7614692 0.74446917 0.7278235 0.7115266 0.6955726 0.6799559 0.6646708 0.6497115 0.63507223 0.6207474 0.60673124 0.59301805 0.57960224 0.5664782 0.5536404 0.54108334 0.52880156 0.51678973 0.50504243 0.49355447 0.4823206 0.47133574 0.46059477 0.45009273 0.4398247 0.42978585 0.4199714 0.41037664 0.40099695 0.39182782 0.38286477 0.3741034 0.3655394 0.35716856 0.3489867 0.34098974 0.33317366 0.32553452 0.31806853 0.31077182 0.30364075 0.29667163 0.2898609 0.28320512 0.2767008 0.27034461 0.26413324 0.25806352 0.25213224 0.24633636 0.2406728 0.23513864 0.22973095 0.22444692 0.21928376 0.21423875 0.20930922 0.20449257 0.19978626 0.19518779 0.19069472 0.18630467 0.18201531 0.17782435 0.17372954 0.16972873 0.16581975 0.16200052 0.15826902 0.15462324 0.15106122 0.14758104 0.14418086 0.14085884 0.13761319 0.13444218 0.1313441 0.12831727 0.12536006 0.1224709 0.11964821 0.116890475 0.11419621 0.11156396 0.1089923 0.106479846 0.10402524 0.10162714 0.09928427 0.09699535 0.094759144 0.09257445 0.09044007 0.08835486 0.08631769 0.084327444 0.08238306 0.080483474 0.07862765 0.0768146 0.07504333 0.07331287 0.0716223 0.06997068 0.06835714 0.06678078 0.065240756 0.06373623 0.062266387 0.060830425 0.059427567 0.058057047 0.056718126 0.05541007 0.05413217 0.052883733 0.05166408 0.050472546

</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="2.575" PeakHeight="231.079" Num="5" zHalfNm="213.533" Error="0.675">
-41.729 2.017 -1.446 0.77 -0.191
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="17" 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="6506.833" A="-2.10612257E11" B="6.5003784E7" C="-5015.5986" Error="0.00148"/>
<QuasiParabolic ID="2" StartDistance="6506.833" EndDistance="6533.667" A="0.0" B="663.24896" C="-0.06191195" Error="0.00999"/>
<QuasiParabolic ID="3" StartDistance="6533.667" EndDistance="6535.0" A="-3.71901334E12" B="1.13814195E9" C="-87077.305" Error="0.0181"/>
<QuasiParabolic ID="4" StartDistance="6535.0" EndDistance="6543.0" A="3.16850078E11" B="-9.7011288E7" C="7425.63" Error="0.0395"/>
<QuasiParabolic ID="5" StartDistance="6543.0" EndDistance="6553.0" A="-7.055215E10" B="2.1406018E7" C="-1623.5303" Error="0.0162"/>
<QuasiParabolic ID="6" StartDistance="6553.0" EndDistance="6554.0" A="1.20019852E12" B="-3.66431808E8" C="27968.857" Error="0.0"/>
<QuasiParabolic ID="7" StartDistance="6554.0" EndDistance="6555.0" A="-1.07693225E12" B="3.28450944E8" C="-25043.254" Error="0.0"/>
<QuasiParabolic ID="8" StartDistance="6555.0" EndDistance="6556.0" A="1.2009645E12" B="-3.6655952E8" C="27970.51" Error="0.0"/>
<QuasiParabolic ID="9" StartDistance="6556.0" EndDistance="6557.0" A="-1.07750123E12" B="3.28518496E8" C="-25040.32" Error="3.38E-11"/>
<QuasiParabolic ID="10" StartDistance="6557.0" EndDistance="6558.0" A="1.20182709E12" B="-3.66716608E8" C="27974.404" Error="3.26E-11"/>
<QuasiParabolic ID="11" StartDistance="6558.0" EndDistance="6559.0" A="-1.07820804E12" B="3.28628032E8" C="-25040.588" Error="3.15E-11"/>
<QuasiParabolic ID="12" StartDistance="6559.0" EndDistance="6560.0" A="1.74385503E12" B="-5.31888224E8" C="40557.543" Error="0.0"/>
<QuasiParabolic ID="13" StartDistance="6560.0" EndDistance="6562.0" A="1.4888199E13" B="-4.5393101E9" C="346001.28" Error="0.0106"/>
<QuasiParabolic ID="14" StartDistance="6562.0" EndDistance="6567.0" A="3.93057613E12" B="-1.19958963E9" C="91527.01" Error="0.019"/>
<QuasiParabolic ID="15" StartDistance="6567.0" EndDistance="6587.0" A="1.27967397E13" B="-3.89980723E9" C="297116.88" Error="0.0274"/>
<QuasiParabolic ID="16" StartDistance="6587.0" EndDistance="6601.079" A="-2.21652084E13" B="6.7156321E9" C="-508670.22" Error="0.00955"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="80.5" Depth="0.154"/>
<TopsideChapman PeakHeight="231.079" PeakDensity="82265.82" PeakScaleHeight="13.391" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
