<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-20 -110 04:40:00.000"
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: 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) 04:40:00</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">
FF202611004200440001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.475" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.756" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="9.297" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.025" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.025" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="2.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="227.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="227.500" 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="2.325" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="255.271" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.025" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.025" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="232.048" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="214.034" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.389" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="25.713" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.456" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="13.925" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="23.660" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.920" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="19">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
227.500 227.500 230.000 230.000 232.500 235.000 235.000 240.000 242.500 245.095 248.036 251.395 255.271 259.791 265.131 271.537 279.361 289.135 301.692
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 78 75 78 78 81 78 78 66 66 0 51 0 0 0 0 0 0 0
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="340">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 137.41667 138.0 139.0 140.0 141.0 142.0 143.0 144.0 145.0 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 164.83333 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 192.25 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 232.048 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0
</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 0.35339895 0.35261247 0.35145745 0.35001534 0.348294 0.34623033 0.34376696 0.34099412 0.3378617 0.33439493 0.33055604 0.32631677 0.32166007 0.316581 0.31108782 0.3051483 0.29865354 0.2916688 0.28410435 0.27593207 0.26707086 0.25740978 0.24700987 0.23557876 0.22317484 0.20959583 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 0.20093617 0.20655319 0.21217021 0.21778724 0.22340426 0.22902128 0.2346383 0.24025533 0.24587233 0.25148937 0.2571064 0.26272342 0.26834044 0.27395746 0.27957445 0.28519148 0.2908085 0.29642552 0.30204254 0.30765957 0.3132766 0.3188936 0.32451063 0.33012766 0.33574468 0.3413617 0.34697872 0.35259575 0.354 0.37684083 0.4115935 0.45100495 0.49439657 0.5409907 0.5901776 0.64160067 0.6951597 0.7509087 0.8090352 0.86977774 0.93344927 1.0003464 1.0707759 1.1449875 1.2231005 1.3050597 1.3905165 1.4787666 1.5686519 1.6586838 1.7471712 1.8324747 1.9132609 1.9885527 2.0578575 2.120961 2.1779435 2.228982 2.274382 2.3144345 2.3494554 2.3797152 2.4054673 2.4269288 2.4442837 2.4576695 2.4672031 2.4729629 2.474992 2.475 2.4738865 2.4703906 2.464624 2.4567018 2.4467402 2.434854 2.4211576 2.4057636 2.3887827 2.3703232 2.350491 2.329389 2.3071167 2.2837708 2.2594435 2.2342248 2.2082 2.1814513 2.1540568 2.1260915 2.0976257 2.0687273 2.0394597 2.0098834 1.9800551 1.9500284 1.9198534 1.8895775 1.8592448 1.8288965 1.7985712 1.7683046 1.7381299 1.708078 1.6781772 1.6484541 1.6189324 1.5896345 1.5605805 1.531789 1.5032765 1.4750582 1.4471478 1.4195576 1.3922982 1.3653793 1.3388095 1.312596 1.286745 1.2612618 1.2361511 1.2114164 1.1870604 1.1630852 1.1394925 1.1162827 1.0934564 1.0710131 1.048952 1.0272719 1.0059712 0.98504776 0.9644993 0.9443231 0.9245162 0.90507525 0.88599694 0.8672775 0.848913 0.83089954 0.8132328 0.79590845 0.77892214 0.7622693 0.74594533 0.7299455 0.714265 0.6988991 0.6838429 0.66909164 0.65464026 0.64048404 0.62661797 0.61303717 0.5997367 0.5867118 0.57395756 0.56146914 0.5492418 0.5372707 0.5255512 0.5140786 0.50284827 0.49185565 0.48109618 0.4705654 0.46025887 0.45017225 0.44030118 0.43064147 0.4211889 0.41193935 0.40288872 0.39403304 0.38536838 0.37689084 0.36859658 0.36048186 0.352543 0.34477636 0.33717838 0.32974556 0.32247445 0.3153617 0.30840394 0.30159795 0.29494053 0.28842854 0.2820589 0.27582857 0.26973465 0.2637742 0.25794432 0.2522423 0.24666539 0.24121086 0.23587613 0.2306586 0.22555576 0.22056514 0.21568428 0.21091084 0.2062425 0.20167696 0.197212 0.19284543 0.18857513 0.18439898 0.18031496 0.17632103 0.17241524 0.16859567 0.16486043 0.16120768 0.15763561 0.15414245 0.1507265 0.14738604 0.14411943 0.14092503 0.13780127 0.13474661 0.13175951 0.12883848 0.12598209 0.12318892 0.12045756 0.11778665 0.115174875 0.11262091 0.11012351 0.1076814 0.10529338 0.10295824 0.10067483 0.098441996 0.09625863 0.09412364 0.09203595 0.08999452 0.08799832 0.086046375 0.08413768 0.082271285 0.080446266 0.078661695 0.07691669 0.075210355 0.07354186 0.07191035 0.07031502 0.06875505 0.06722968 0.065738134 0.06427966 0.06285352 0.061459016 0.060095437 0.058762096 0.057458326 0.056183472 0.054936893 0.053717963 0.052526068 0.05136061 0.050221007

</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="2.475" PeakHeight="232.048" Num="5" zHalfNm="214.034" Error="1.679">
-42.053 4.213 -2.884 1.367 -0.441
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="11" 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="6507.417" A="-2.01785164E11" B="6.2279372E7" C="-4805.382" Error="0.00146"/>
<QuasiParabolic ID="2" StartDistance="6507.417" EndDistance="6534.833" A="0.0" B="-245.87784" C="0.07779774" Error="0.0043"/>
<QuasiParabolic ID="3" StartDistance="6534.833" EndDistance="6537.0" A="7.1814768E11" B="-2.19833008E8" C="16823.373" Error="0.0187"/>
<QuasiParabolic ID="4" StartDistance="6537.0" EndDistance="6560.0" A="3.6771197E10" B="-1.1365367E7" C="878.16547" Error="0.0189"/>
<QuasiParabolic ID="5" StartDistance="6560.0" EndDistance="6561.0" A="-1.21686078E12" B="3.70839488E8" C="-28253.303" Error="3.12E-11"/>
<QuasiParabolic ID="6" StartDistance="6561.0" EndDistance="6566.0" A="8.3638076E12" B="-2.54965094E9" C="194311.12" Error="0.0155"/>
<QuasiParabolic ID="7" StartDistance="6566.0" EndDistance="6570.0" A="5.9643113E12" B="-1.81876544E9" C="138654.3" Error="0.00753"/>
<QuasiParabolic ID="8" StartDistance="6570.0" EndDistance="6573.0" A="1.03375186E13" B="-3.1500311E9" C="239968.28" Error="0.00418"/>
<QuasiParabolic ID="9" StartDistance="6573.0" EndDistance="6585.0" A="1.72679171E13" B="-5.2587786E9" C="400378.1" Error="0.0115"/>
<QuasiParabolic ID="10" StartDistance="6585.0" EndDistance="6602.048" A="-1.80507472E13" B="5.4682266E9" C="-414124.94" Error="0.00251"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="82.25" Depth="0.154"/>
<TopsideChapman PeakHeight="232.048" PeakDensity="76000.31" PeakScaleHeight="13.925" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
