<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-23 -113 01:35:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.49 Confidence: 70% PACIFIC flags: One of F2 cusps was derived from the other, Unidentified traces above foF2</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.23 (113) 01:35:00</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">
FF202611304230135001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.575" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.576" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="9.208" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.075" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.075" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.050" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="2.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="296.245" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.075" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.075" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="253.973" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="233.872" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.036" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="28.657" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.547" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="15.287" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="28.350" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.240" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
247.500 250.000 250.000 252.500 255.000 257.500 260.000 261.864 263.897 266.124 268.573 271.280 274.287 277.647 281.426 285.708 290.601 296.245 302.828 310.605 319.932
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 69 81 0 69 69 57 0 0 0 0 0 0 0 0 66 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 10.9375 1.5625 -1.5625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="383">
<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 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 206.25 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 253.973 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0 464.0 465.0 466.0 467.0 468.0 469.0 470.0 471.0
</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 0.37613 0.40750122 0.44088057 0.47612303 0.5131295 0.551843 0.59222215 0.6342839 0.67802966 0.723503 0.7707538 0.81982714 0.8707661 0.9236334 0.9784513 1.0352377 1.0939986 1.1547087 1.2172756 1.2816026 1.3475395 1.4148536 1.4832911 1.5525308 1.6221921 1.6918615 1.7611128 1.8294914 1.8965275 1.9618115 2.02494 2.0855477 2.143316 2.197988 2.2493484 2.2972102 2.3414543 2.3819726 2.4187071 2.451599 2.4806266 2.5057693 2.5270236 2.544388 2.557863 2.5674546 2.5731652 2.575 2.5749993 2.573881 2.570702 2.5655522 2.5585225 2.5497036 2.5391862 2.5270607 2.5134165 2.4983413 2.4819217 2.4642427 2.445387 2.4254353 2.4044662 2.3825557 2.3597775 2.3362029 2.3119001 2.2869353 2.2613716 2.2352695 2.208687 2.1816795 2.1543 2.1265981 2.0986218 2.0704165 2.0420246 2.013487 1.984842 1.9561251 1.9273705 1.8986102 1.869874 1.8411897 1.8125837 1.78408 1.7557017 1.7274697 1.6994036 1.6715214 1.6438401 1.6163746 1.5891393 1.5621471 1.5354097 1.5089378 1.4827411 1.4568282 1.4312071 1.4058845 1.3808666 1.3561589 1.3317658 1.3076915 1.2839391 1.2605116 1.237411 1.2146392 1.1921971 1.1700857 1.1483052 1.1268555 1.1057363 1.0849466 1.0644855 1.0443516 1.0245433 1.0050585 0.98589534 0.9670514 0.9485242 0.93031096 0.912409 0.8948152 0.8775266 0.8605398 0.8438516 0.8274586 0.81135726 0.79554397 0.7800151 0.76476705 0.74979603 0.7350983 0.72067004 0.70650744 0.6926067 0.6789639 0.66557527 0.65243685 0.63954484 0.6268955 0.6144848 0.60230905 0.5903644 0.57864714 0.5671534 0.55587953 0.54482186 0.5339767 0.5233403 0.5129092 0.50267977 0.4926485 0.4828119 0.47316653 0.46370897 0.45443588 0.44534388 0.43642977 0.42769024 0.41912213 0.4107223 0.4024876 0.39441505 0.38650158 0.37874424 0.37114012 0.36368632 0.35638002 0.3492184 0.3421988 0.33531842 0.32857466 0.32196492 0.3154866 0.30913723 0.30291426 0.2968153 0.29083797 0.28497988 0.2792387 0.2736122 0.26809815 0.26269433 0.25739864 0.2522089 0.24712305 0.24213907 0.23725498 0.23246878 0.22777857 0.22318245 0.21867856 0.2142651 0.20994024 0.20570228 0.20154946 0.1974801 0.19349255 0.1895852 0.18575643 0.1820047 0.17832847 0.17472625 0.17119654 0.1677379 0.16434892 0.1610282 0.15777442 0.15458618 0.1514622 0.1484012 0.14540191 0.1424631 0.13958356 0.1367621 0.13399754 0.13128877 0.12863465 0.1260341 0.12348601 0.12098937 0.11854311 0.116146244 0.11379777 0.11149672 0.10924213 0.10703307 0.10486862 0.102747895 0.10067001 0.098634094 0.09663931 0.094684824 0.09276983 0.09089354 0.08905515 0.08725392 0.08548909 0.083759926 0.08206571 0.080405734 0.07877932 0.07718578 0.07562445 0.07409468 0.07259584 0.07112731 0.06968846 0.06827871 0.06689745 0.06554413 0.06421817 0.06291903 0.061646152 0.06039902 0.059177104 0.0579799 0.056806907 0.055657636 0.05453161 0.053428356 0.052347418 0.05128834 0.050250683

</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="253.973" Num="5" zHalfNm="233.872" Error="1.056">
-48.218 1.169 -1.149 0.642 -0.167
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="12" 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="-198.44865" C="0.070500135" Error="0.00439"/>
<QuasiParabolic ID="3" StartDistance="6544.167" EndDistance="6546.0" A="8.354872E11" B="-2.55362944E8" C="19512.676" Error="0.0154"/>
<QuasiParabolic ID="4" StartDistance="6546.0" EndDistance="6574.0" A="2.89340867E10" B="-8936696.0" C="690.0181" Error="0.0189"/>
<QuasiParabolic ID="5" StartDistance="6574.0" EndDistance="6575.0" A="-1.09580308E12" B="3.33240736E8" C="-25335.037" Error="3.09E-11"/>
<QuasiParabolic ID="6" StartDistance="6575.0" EndDistance="6579.0" A="7.7606609E12" B="-2.36074086E9" C="179530.47" Error="0.0158"/>
<QuasiParabolic ID="7" StartDistance="6579.0" EndDistance="6580.0" A="-3.02437892E12" B="9.1788512E8" C="-69643.1" Error="0.0"/>
<QuasiParabolic ID="8" StartDistance="6580.0" EndDistance="6587.0" A="5.3828382E12" B="-1.6374999E9" C="124535.1" Error="0.00507"/>
<QuasiParabolic ID="9" StartDistance="6587.0" EndDistance="6600.0" A="1.01245151E13" B="-3.07720755E9" C="233819.11" Error="0.018"/>
<QuasiParabolic ID="10" StartDistance="6600.0" EndDistance="6610.0" A="5.0589178E12" B="-1.54217805E9" C="117529.0" Error="0.0168"/>
<QuasiParabolic ID="11" StartDistance="6610.0" EndDistance="6623.973" A="-1.80049664E13" B="5.4363044E9" C="-410344.1" Error="0.00709"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="96.25" Depth="0.154"/>
<TopsideChapman PeakHeight="253.973" PeakDensity="82265.82" PeakScaleHeight="15.287" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
