<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 18:00:00.000"
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="18.0">
<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" >
2026.02.01 (032) 18:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603202011800009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.449" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.087" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="390.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="390.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="530.000" 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="3.060" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.203" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="374.824" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="262.186" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.468" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="142.774" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.606" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="78.212" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="196.560" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.100" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="75">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
390.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 406.250 407.500 408.750 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 430.000 432.500 435.000 445.000 445.000 445.000 450.000 450.000 455.000 460.000 460.000 465.000 465.000 470.000 475.000 475.000 480.000 485.000 485.000 485.000 490.000 495.000 495.000 500.000 505.000 505.000 505.000 510.000 510.000 510.000 510.000 515.000 515.000 515.000 520.000 520.000 525.000 527.500 530.000 530.000 530.000 535.000 540.000 543.978 548.343 553.157 558.491 564.436 571.101 578.626 587.190 597.023 608.431
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 45 45 45 45 45 48 48 0 0 0 48 51 51 45 48 48 51 51 48 0 48 0 45 45 51 51 54 54 54 51 54 54 57 60 54 60 57 48 57 57 60 54 57 60 51 54 57 54 60 57 57 54 57 54 57 51 54 0 54 0 0 0 51 48 48 45 48 45 42 45 42 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 -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 1.953125 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.535 90.0 95.0 100.0 105.0 110.0 112.952 115.0 115.903 118.855 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 374.824 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.057 2.649 2.96 3.06 2.938 2.938 2.938 3.06 3.095 3.253 3.419 3.59 3.766 3.942 4.119 4.294 4.467 4.637 4.804 4.968 5.129 5.288 5.444 5.598 5.749 5.899 6.047 6.193 6.338 6.482 6.625 6.767 6.908 7.049 7.189 7.329 7.469 7.609 7.75 7.89 8.031 8.172 8.314 8.457 8.601 8.746 8.892 9.04 9.189 9.34 9.492 9.645 9.8 9.956 10.111 10.262 10.405 10.529 10.618 10.65 10.65 10.646 10.633 10.612 10.585 10.55 10.508 10.46 10.406 10.346 10.28 10.21 10.135 10.056 9.972 9.885 9.794 9.7 9.603 9.503 9.4 9.296 9.189 9.081 8.971 8.86 8.747 8.634 8.52 8.405 8.289 8.173 8.057 7.941 7.825 7.708 7.593 7.477 7.362 7.247 7.133 7.02 6.907 6.795 6.684 6.574 6.465 6.357 6.25 6.144 6.039 5.935 5.833 5.731 5.631 5.532 5.435 5.338 5.243 5.15 5.057 4.966 4.876 4.787 4.7 4.614 4.529 4.446 4.364 4.283 4.204 4.125 4.048 3.973 3.898 3.825 3.753 3.682 3.613 3.544 3.477 3.411 3.346 3.282 3.22 3.158 3.098 3.038 2.98 2.923 2.867 2.812 2.757 2.704 2.652 2.601 2.55 2.501 2.452 2.405 2.358 2.312 2.267 2.223 2.18 2.138 2.096 2.055 2.015 1.976 1.937 1.899 1.862 1.826 1.79 1.755 1.72 1.687 1.654 1.621 1.589 1.558 1.528 1.498 1.468 1.439

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.06" PeakHeight="110.0" Num="3" Error="0.0">
-30.245 12.775 -2.995
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.06" EndFrequency="10.65" PeakHeight="374.824" Num="5" zHalfNm="262.186" Error="1.321">
-213.495 -70.016 36.262 -9.331 0.611
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.855" Depth="0.122"/>
<TopsideChapman PeakHeight="374.824" PeakDensity="1407227.0" PeakScaleHeight="78.212" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
