<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-20 -110 04:30:00.000"
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) 04:30:00</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">
FF202611004200430001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.675" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.711" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="9.927" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="237.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="237.500" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="2.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="267.500" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="239.694" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="222.643" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.397" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="24.324" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.501" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="12.967" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="23.980" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="18">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
237.500 239.375 241.250 243.125 245.000 247.500 250.000 252.500 255.000 257.500 262.500 265.000 267.500 272.500 277.500 290.000 297.500 309.661
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 0 0 51 0 0 0 0 66 63 63 63 69 66 60 63 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.5625 7.8125 1.5625 1.5625 -1.5625 -1.5625 -4.6875 -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="337">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 139.75 140.0 141.0 142.0 143.0 144.0 145.0 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 169.5 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 199.25 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 239.694 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0
</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 0.35347393 0.352762 0.35182965 0.3506064 0.3491724 0.34738788 0.34533682 0.34299496 0.34037665 0.33746356 0.3342082 0.33063674 0.3267138 0.32253745 0.31796023 0.31297803 0.30765462 0.30189866 0.29567927 0.28909197 0.28191414 0.2741947 0.26597098 0.25704813 0.24743798 0.23701459 0.22570056 0.21345264 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 0.20258823 0.2077647 0.21294117 0.21811765 0.22329412 0.2284706 0.23364706 0.23882353 0.244 0.24917647 0.25435293 0.2595294 0.2647059 0.26988235 0.27505884 0.2802353 0.28541178 0.29058823 0.2957647 0.30094117 0.30611765 0.3112941 0.3164706 0.32164705 0.32682353 0.332 0.33717647 0.34235293 0.3475294 0.3527059 0.354 0.38173932 0.42127195 0.46349323 0.5082137 0.55534434 0.60486203 0.6568082 0.7112386 0.7682613 0.82797784 0.89048135 0.95587325 1.0242333 1.0955677 1.1698687 1.2470131 1.3268166 1.40899 1.493119 1.5786726 1.665009 1.7514199 1.8371177 1.9213202 2.003248 2.0821738 2.1574984 2.228661 2.2952278 2.3568735 2.4133477 2.4644675 2.5101104 2.5502257 2.5847588 2.6137028 2.6370559 2.6548283 2.6670268 2.6736617 2.675 2.6748552 2.6724062 2.667048 2.658935 2.648222 2.6350632 2.619612 2.6020198 2.5824351 2.5610032 2.5378656 2.51316 2.4870186 2.4595695 2.4309356 2.4012349 2.3705797 2.339077 2.306829 2.273932 2.2404773 2.2065513 2.1722353 2.137605 2.1027324 2.067684 2.0325224 1.9973055 1.9620875 1.9269183 1.891844 1.8569076 1.822148 1.7876014 1.7533007 1.7192757 1.6855539 1.6521599 1.6191161 1.5864421 1.554156 1.5222733 1.4908082 1.4597728 1.4291775 1.3990314 1.3693419 1.3401153 1.3113568 1.2830701 1.2552582 1.2279228 1.201065 1.1746849 1.148782 1.123355 1.0984021 1.0739208 1.0499082 1.0263605 1.0032742 0.98064494 0.9584681 0.9367387 0.91545165 0.8946015 0.8741826 0.85418916 0.8346151 0.8154544 0.79670084 0.778348 0.76038957 0.742819 0.7256298 0.70881546 0.6923694 0.6762851 0.6605559 0.6451754 0.63013697 0.61543417 0.60106057 0.5870097 0.5732753 0.5598511 0.5467309 0.5339084 0.5213776 0.5091326 0.49716735 0.48547602 0.47405288 0.46289223 0.4519885 0.44133615 0.43092978 0.4207641 0.41083384 0.40113384 0.39165908 0.3824046 0.3733655 0.36453697 0.35591438 0.34749308 0.3392686 0.33123648 0.3233924 0.31573206 0.30825135 0.30094615 0.29381248 0.28684646 0.28004417 0.27340192 0.26691604 0.26058286 0.25439897 0.24836083 0.24246512 0.23670854 0.23108783 0.22559988 0.22024159 0.21500994 0.20990199 0.20491484 0.20004568 0.19529176 0.19065036 0.18611889 0.18169473 0.17737539 0.1731584 0.16904137 0.16502194 0.16109782 0.15726678 0.15352662 0.14987518 0.1463104 0.14283022 0.13943265 0.13611576 0.1328776 0.12971635 0.12663019 0.12361732 0.12067603 0.117804624 0.11500145 0.11226488 0.10959335 0.106985316 0.10443927 0.10195376 0.09952734 0.097158596 0.09484618 0.09258875 0.09038501 0.08823367 0.0861335 0.08408329 0.08208183 0.08012799 0.07822063 0.07635864 0.07454094 0.0727665 0.07103427 0.069343254 0.06769248 0.06608098 0.06450783 0.06297211 0.061472945 0.060009453 0.05858079 0.057186127 0.055824656 0.05449559 0.053198155 0.051931605 0.050695196

</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="239.694" Num="5" zHalfNm="222.643" Error="1.37">
-41.114 1.265 -1.035 0.578 -0.138
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="9" 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="6509.75" A="-1.71482022E11" B="5.2926548E7" C="-4083.7134" Error="0.00152"/>
<QuasiParabolic ID="2" StartDistance="6509.75" EndDistance="6539.5" A="0.0" B="-428.7133" C="0.105880015" Error="0.00806"/>
<QuasiParabolic ID="3" StartDistance="6539.5" EndDistance="6568.0" A="5.1859153E10" B="-1.5945126E7" C="1225.6669" Error="0.011"/>
<QuasiParabolic ID="4" StartDistance="6568.0" EndDistance="6573.0" A="8.6459846E12" B="-2.63291392E9" C="200446.8" Error="0.032"/>
<QuasiParabolic ID="5" StartDistance="6573.0" EndDistance="6582.0" A="8.0929442E12" B="-2.46463744E9" C="187646.22" Error="0.0349"/>
<QuasiParabolic ID="6" StartDistance="6582.0" EndDistance="6585.0" A="2.52846004E13" B="-7.6884772E9" C="584473.94" Error="0.00607"/>
<QuasiParabolic ID="7" StartDistance="6585.0" EndDistance="6597.0" A="1.144689E13" B="-3.48567962E9" C="265354.88" Error="0.0238"/>
<QuasiParabolic ID="8" StartDistance="6597.0" EndDistance="6609.694" A="-2.63599361E13" B="7.9761439E9" C="-603359.94" Error="0.00912"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="89.25" Depth="0.154"/>
<TopsideChapman PeakHeight="239.694" PeakDensity="88779.47" PeakScaleHeight="12.967" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
