<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 09:00:00.000"
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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2o 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" >
2026.10.17 (290) 09:00:00</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">
FF202629010170900009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="7.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.401" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.655" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.400" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.560" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.550" 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="24" Val="103.789" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="97.567" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="7.533" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="315.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.569" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="247.244" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="196.356" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.845" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="69.558" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.484" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.722" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="79.300" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.520" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="36">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 270.000 271.111 272.222 273.333 274.444 275.556 277.500 279.444 281.389 283.333 285.278 287.222 289.167 291.111 293.056 295.000 295.000 295.000 295.000 300.000 300.000 295.000 300.000 305.000 305.000 310.000 315.000 315.000 315.000 318.956 324.180 331.395 342.009 359.165 391.606
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
78 75 0 0 0 0 78 0 0 0 63 0 0 0 0 0 66 72 75 78 75 78 75 60 72 78 75 69 63 60 66 63 0 0 0 51
</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 -2.734375 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.4 1.45 1.5 1.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
103.789 104.807 105.993 107.415
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 57 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 1.171875 -0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="133">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.0 95.0 97.567 100.0 105.0 108.365 110.0 115.0 119.164 120.0 125.0 129.962 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 247.244 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.466 1.56 1.553 1.494 1.417 1.417 1.417 1.417 1.428 1.494 1.56 1.562 1.769 1.991 2.232 2.493 2.772 3.061 3.355 3.649 3.94 4.226 4.507 4.783 5.054 5.321 5.583 5.842 6.096 6.344 6.583 6.807 7.004 7.157 7.241 7.25 7.246 7.22 7.171 7.101 7.014 6.911 6.793 6.664 6.525 6.378 6.224 6.064 5.901 5.735 5.567 5.399 5.23 5.063 4.897 4.732 4.57 4.411 4.255 4.102 3.953 3.808 3.666 3.528 3.394 3.265 3.139 3.017 2.9 2.786 2.676 2.57 2.468 2.37 2.275 2.183 2.095 2.011 1.929 1.851 1.776 1.703 1.634 1.567 1.503 1.441 1.382 1.325 1.27 1.218 1.168 1.12 1.073 1.029 0.986 0.946 0.906 0.869 0.833 0.798 0.765 0.733 0.703 0.674 0.646 0.619 0.593 0.569 0.545 0.522 0.501 0.48 0.46 0.441 0.422 0.405 0.388 0.372 0.356 0.341 0.327 0.314 0.301 0.288 0.276 0.265 0.254 0.243 0.233 0.223 0.214 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.56" PeakHeight="97.567" Num="3" Error="3.145">
-10.643 3.788 -0.712
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.56" EndFrequency="7.25" PeakHeight="247.244" Num="5" zHalfNm="196.356" Error="1.334">
-107.575 -16.028 9.458 -4.043 0.906
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="32.395" Depth="0.143"/>
<TopsideChapman PeakHeight="247.244" PeakDensity="652140.2" PeakScaleHeight="36.722" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
