<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 19:00:00.000"
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="14.0">
<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 0 0 0 0 0 0 0 0 1 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" >
2026.10.25 (298) 19:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629810251900009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.008" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="36.399" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="343.696" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="343.696" 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="11.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="400.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.577" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="287.657" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="219.449" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.386" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="91.214" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.506" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.813" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="109.780" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="61">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
343.696 344.130 344.565 345.000 350.000 350.000 351.000 352.000 353.000 354.000 355.000 355.000 355.000 355.000 355.000 355.000 355.625 356.250 356.875 357.500 358.125 358.750 359.375 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 408.724 412.807 417.304 422.280 427.818
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 69 66 0 48 54 0 60 0 42 48 0 0 0 42 0 51 0 0 0 54 0 45 0 54 60 0 0 0 0 0 0 51 0 39 0 42 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 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="183">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.623 90.0 95.0 100.0 105.0 110.0 115.0 115.202 120.0 120.403 125.0 125.605 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 287.657 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.231 1.731 2.231 2.493 2.577 2.463 2.453 2.453 2.453 2.563 2.577 2.801 3.053 3.318 3.603 3.915 4.255 4.617 4.993 5.372 5.745 6.106 6.454 6.788 7.11 7.421 7.723 8.017 8.305 8.587 8.865 9.14 9.414 9.686 9.958 10.231 10.506 10.784 11.064 11.346 11.625 11.884 12.069 12.1 12.097 12.072 12.022 11.951 11.858 11.747 11.619 11.476 11.319 11.15 10.97 10.782 10.586 10.383 10.175 9.963 9.747 9.529 9.31 9.089 8.868 8.648 8.429 8.211 7.995 7.782 7.571 7.363 7.158 6.957 6.759 6.565 6.374 6.188 6.005 5.827 5.653 5.483 5.317 5.155 4.997 4.844 4.694 4.549 4.407 4.27 4.136 4.006 3.88 3.757 3.638 3.523 3.411 3.302 3.196 3.094 2.995 2.899 2.805 2.715 2.628 2.543 2.461 2.381 2.304 2.229 2.157 2.087 2.019 1.954 1.89 1.829 1.769 1.711 1.656 1.602 1.549 1.499 1.45 1.403 1.357 1.312 1.269 1.228 1.188 1.149 1.111 1.075 1.04 1.006 0.973 0.941 0.91 0.88 0.851 0.824 0.797 0.77 0.745 0.721 0.697 0.674 0.652 0.631 0.61 0.59 0.571 0.552 0.534 0.516 0.499 0.483 0.467 0.452 0.437 0.423 0.409 0.395 0.382 0.37 0.358 0.346 0.335 0.324 0.313 0.303 0.293 0.283 0.274 0.265 0.256 0.248 0.24 0.232 0.224 0.217 0.21 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.577" PeakHeight="110.0" Num="3" Error="0.0">
-29.797 12.127 -2.707
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.577" EndFrequency="12.1" PeakHeight="287.657" Num="5" zHalfNm="219.449" Error="3.463">
-140.868 -36.872 24.608 -12.003 3.083
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="15.605" Depth="0.124"/>
<TopsideChapman PeakHeight="287.657" PeakDensity="1816501.2" PeakScaleHeight="46.813" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
