<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-15 -288 08:30:00.000"
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="15.0">
<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" >
2026.10.15 (288) 08:30:00</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">
FF202628810150830009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.283" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.699" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="300.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.914" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="285.185" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="232.004" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.818" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="75.745" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.698" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="40.808" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="72.500" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.550" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="39">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 271.200 272.400 273.600 274.800 276.000 277.200 278.400 279.600 280.800 282.000 283.200 284.400 285.600 286.800 288.000 289.200 290.400 291.600 292.800 294.000 295.200 296.400 297.600 298.800 300.000 300.000 307.500 315.000 322.500 330.000 343.750 357.500 371.250 385.000 365.000 415.000 436.438 506.057
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 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 51 0 0 66 69 60 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 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 0.390625 0.390625 1.171875 1.171875 1.171875 -0.390625 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="145">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.374 95.0 100.0 105.0 110.0 115.0 120.0 125.0 129.355 130.0 135.0 140.0 145.0 148.71 150.0 155.0 160.0 165.0 168.065 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 285.185 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.608 0.792 0.885 0.914 0.899 0.852 0.768 0.654 0.654 0.654 0.654 0.654 0.654 0.671 0.738 0.806 0.873 0.914 0.966 1.124 1.308 1.512 1.733 1.969 2.223 2.495 2.787 3.099 3.428 3.768 4.109 4.438 4.743 5.018 5.258 5.462 5.63 5.765 5.868 5.941 5.985 6.0 6.0 5.992 5.968 5.929 5.876 5.811 5.736 5.651 5.557 5.457 5.35 5.239 5.123 5.003 4.882 4.758 4.633 4.508 4.383 4.257 4.133 4.01 3.888 3.767 3.649 3.533 3.418 3.307 3.197 3.091 2.986 2.885 2.786 2.69 2.597 2.506 2.418 2.333 2.25 2.17 2.092 2.017 1.944 1.874 1.806 1.741 1.677 1.616 1.557 1.5 1.445 1.391 1.34 1.291 1.243 1.197 1.153 1.11 1.069 1.029 0.991 0.954 0.918 0.884 0.851 0.819 0.789 0.759 0.731 0.704 0.677 0.652 0.628 0.604 0.582 0.56 0.539 0.519 0.499 0.481 0.463 0.445 0.428 0.412 0.397 0.382 0.368 0.354 0.341 0.328 0.316 0.304 0.292 0.281 0.271 0.261 0.251 0.241 0.232 0.224 0.215 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.914" PeakHeight="110.0" Num="3" Error="0.0">
-26.092 7.573 -1.107
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.914" EndFrequency="6.0" PeakHeight="285.185" Num="5" zHalfNm="232.004" Error="2.776">
-122.429 9.444 -6.005 2.759 -0.889
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="58.065" Depth="0.26"/>
<TopsideChapman PeakHeight="285.185" PeakDensity="446650.12" PeakScaleHeight="40.808" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
