<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 05:20:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="12.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 22 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.10.20 (293) 05:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202629310200520009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.186" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.026" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" 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="0.600" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="350.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="320.856" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="265.572" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.783" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="80.972" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="9.219" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="40.021" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="79.720" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.070" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="105">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.4 1.45 1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 222.500 220.000 220.000 220.000 220.000 220.000 220.000 230.000 231.222 232.444 233.667 234.889 236.111 237.333 238.556 239.778 241.000 242.222 243.444 244.667 245.889 247.111 248.333 249.556 250.778 252.000 253.222 254.444 255.667 256.889 258.111 259.333 260.556 261.778 263.000 264.222 265.444 266.667 267.889 269.111 270.333 271.556 272.778 274.000 275.222 276.444 277.667 278.889 280.111 281.333 282.556 283.778 285.000 300.000 297.500 295.000 290.000 285.000 280.000 275.000 270.000 290.000 310.000 318.125 326.250 334.375 342.500 350.625 358.750 366.875 375.000 372.500 370.000 385.000 390.000 385.000 380.000 375.000 370.000 360.000 360.000 359.412 358.824 358.235 357.647 357.059 356.471 355.882 355.294 354.706 354.118 353.529 352.941 352.353 351.765 351.176 350.588 350.000 360.894 374.547 392.159 415.745 448.965 499.236
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 63 0 66 60 0 63 66 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 54 0 66 0 63 0 0 66 0 63 51 0 0 0 0 0 0 51 0 51 51 51 0 0 0 0 54 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 -0.390625 0.390625 1.171875 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 1.171875 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 2.734375 -1.171875 1.171875 0.390625 1.171875 0.390625 -0.390625 1.171875 -0.390625 0.390625 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 1.953125 1.171875 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="153">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.667 140.0 145.0 150.0 155.0 160.0 161.333 165.0 170.0 175.0 180.0 185.0 187.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 320.856 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.349 0.335 0.31 0.271 0.21 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.252 0.282 0.312 0.342 0.354 0.412 0.511 0.636 0.829 1.199 1.732 2.172 2.533 2.85 3.139 3.411 3.671 3.922 4.166 4.405 4.64 4.872 5.1 5.325 5.545 5.759 5.963 6.154 6.324 6.463 6.558 6.599 6.6 6.593 6.568 6.526 6.468 6.396 6.311 6.216 6.111 5.998 5.878 5.752 5.622 5.488 5.351 5.212 5.072 4.932 4.791 4.651 4.511 4.373 4.237 4.103 3.971 3.841 3.714 3.59 3.468 3.35 3.234 3.122 3.012 2.906 2.803 2.703 2.606 2.512 2.421 2.333 2.247 2.165 2.085 2.008 1.934 1.862 1.793 1.726 1.662 1.599 1.539 1.482 1.426 1.372 1.321 1.271 1.223 1.176 1.132 1.089 1.048 1.008 0.97 0.933 0.897 0.863 0.83 0.799 0.768 0.739 0.711 0.684 0.658 0.633 0.608 0.585 0.563 0.541 0.521 0.501 0.482 0.463 0.446 0.428 0.412 0.396 0.381 0.367 0.353 0.339 0.326 0.314 0.302 0.29 0.279 0.268 0.258 0.248 0.239 0.23 0.221 0.212 0.204

</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="6.6" PeakHeight="320.856" Num="5" zHalfNm="265.572" Error="7.792">
-145.331 8.446 11.521 -12.879 4.387
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.0" Depth="0.154"/>
<TopsideChapman PeakHeight="320.856" PeakDensity="540446.6" PeakScaleHeight="40.021" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
