<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-04 -035 17:00:00.000"
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: 70% PACIFIC flags: Multiple candidates for F2o cusp</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" >
2026.02.04 (035) 17:00:00</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">
FF202603502041700009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="9.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.351" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.691" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="9.250" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="550.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="550.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" Name="h`Es" 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="8.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="550.000" 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="3.251" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.295" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="372.938" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="230.404" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.109" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.150" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="188.061" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.452" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="102.867" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="214.170" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.690" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="8.950" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="15">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
550.000 555.000 561.250 567.500 573.750 580.000 585.000 590.000 600.000 615.000 625.000 640.000 660.000 683.518 713.660
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 0 0 54 54 54 57 57 57 57 54 48 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="103">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
120.000 120.000 118.333 116.667 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 110.000 110.000 113.333 116.667 120.000 120.000 120.000 120.000 120.000 115.000 115.000 120.000 119.375 118.750 118.125 117.500 116.875 116.250 115.625 115.000 110.000 110.000 110.000 110.000 110.000 115.000 115.000 115.000 115.000 115.000 110.000 110.000 110.000 110.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 112.500 110.000 110.000 110.000 110.000 115.000 115.000 115.000 115.000 115.000 115.000 110.000 115.000 115.000 115.000 115.000 115.000 120.000 120.000 119.286 118.571 117.857 117.143 116.429 115.714 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 0 51 51 0 51 0 51 54 54 0 0 51 54 54 54 0 0 57 0 0 0 48 48 0 0 51 51 0 51 51 66 63 48 0 0 0 48 0 0 0 60 57 60 57 57 57 66 69 69 69 66 63 60 60 60 0 51 0 66 63 63 60 57 60 51 63 57 57 60 63 63 60 63 63 57 57 54 51 57 0 60 51 51 0 0 45 54 0 0 54 54 0 45 45 0 48 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 -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 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 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 1.171875 -0.390625 0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -1.171875 -0.390625
</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" >
89.505 90.0 95.0 100.0 105.0 110.0 112.126 114.253 115.0 116.379 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 372.938 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.187 2.814 3.145 3.251 3.129 3.129 3.172 3.251 3.36 3.503 3.643 3.782 3.923 4.067 4.214 4.365 4.52 4.679 4.842 5.008 5.177 5.346 5.517 5.686 5.855 6.021 6.186 6.347 6.505 6.66 6.811 6.96 7.105 7.247 7.386 7.522 7.655 7.786 7.913 8.038 8.161 8.281 8.398 8.513 8.624 8.733 8.839 8.941 9.04 9.134 9.223 9.307 9.384 9.453 9.514 9.565 9.605 9.633 9.648 9.65 9.65 9.646 9.637 9.625 9.609 9.588 9.564 9.537 9.506 9.472 9.435 9.394 9.351 9.305 9.256 9.205 9.152 9.096 9.038 8.979 8.917 8.854 8.788 8.722 8.654 8.584 8.513 8.441 8.368 8.294 8.22 8.144 8.068 7.99 7.913 7.835 7.756 7.677 7.598 7.518 7.438 7.358 7.278 7.198 7.118 7.038 6.958 6.878 6.799 6.719 6.64 6.561 6.482 6.404 6.326 6.249 6.172 6.095 6.019 5.943 5.868 5.793 5.719 5.646 5.573 5.5 5.429 5.357 5.287 5.217 5.148 5.079 5.011 4.944 4.877 4.811 4.746 4.681 4.617 4.554 4.491 4.429 4.368 4.307 4.247 4.188 4.13 4.072 4.015 3.958 3.902 3.847 3.793 3.739 3.686 3.633 3.581 3.53 3.48 3.43 3.381 3.332 3.284 3.237 3.19 3.144 3.098 3.053 3.009 2.965 2.922 2.88 2.838 2.796 2.756 2.715 2.676 2.636 2.598 2.56 2.522 2.485 2.448 2.412 2.377 2.342

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.251" PeakHeight="110.0" Num="3" Error="0.0">
-30.397 12.999 -3.097
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.251" EndFrequency="9.65" PeakHeight="372.938" Num="5" zHalfNm="230.404" Error="5.44">
-243.354 -22.492 14.433 -7.733 2.587
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.379" Depth="0.122"/>
<TopsideChapman PeakHeight="372.938" PeakDensity="1155366.0" PeakScaleHeight="102.867" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
