<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 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="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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Trace overlaps while constructing baseline</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" >
2026.02.06 (037) 09:00:00</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">
FF202603702060900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="4.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.241" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.719" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="305.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.981" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="288.691" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="227.601" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.294" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="87.433" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.931" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.182" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="74.890" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.550" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="59">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 255.000 255.000 255.000 255.000 252.500 250.000 250.000 250.714 251.429 252.143 252.857 253.571 254.286 255.000 250.000 252.500 255.000 255.000 260.000 255.000 255.000 260.000 260.000 260.000 260.000 260.556 261.111 261.667 262.222 262.778 263.333 263.889 264.444 265.000 265.000 280.000 280.000 285.000 290.000 295.000 295.000 295.000 295.000 300.000 305.000 300.000 302.500 305.000 320.000 320.000 325.000 335.000 345.000 355.000 380.000 396.630 421.789 464.301
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 66 0 63 63 54 69 69 0 0 0 0 0 0 69 72 0 81 78 72 69 69 66 72 72 0 0 60 0 0 0 0 51 0 60 54 0 69 66 0 63 60 0 63 60 69 63 60 69 66 69 63 69 63 54 57 60 54 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 -1.953125 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 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 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="158">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.292 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.371 130.0 135.0 140.0 144.742 145.0 150.0 155.0 160.0 162.113 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 288.691 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.653 0.85 0.95 0.981 0.965 0.914 0.823 0.762 0.762 0.762 0.762 0.762 0.765 0.828 0.891 0.954 0.981 1.082 1.221 1.348 1.475 1.606 1.745 1.895 2.061 2.248 2.46 2.704 2.979 3.275 3.567 3.831 4.055 4.24 4.391 4.514 4.613 4.692 4.754 4.799 4.83 4.846 4.85 4.85 4.842 4.825 4.8 4.766 4.725 4.678 4.624 4.565 4.502 4.434 4.362 4.287 4.21 4.13 4.048 3.965 3.881 3.795 3.71 3.624 3.538 3.452 3.367 3.282 3.198 3.115 3.033 2.952 2.872 2.794 2.717 2.641 2.566 2.494 2.422 2.352 2.284 2.217 2.152 2.089 2.027 1.966 1.908 1.85 1.794 1.74 1.687 1.636 1.586 1.537 1.49 1.444 1.399 1.356 1.314 1.273 1.233 1.195 1.158 1.122 1.086 1.052 1.019 0.987 0.956 0.926 0.897 0.869 0.841 0.815 0.789 0.764 0.74 0.717 0.694 0.672 0.651 0.63 0.61 0.591 0.572 0.554 0.536 0.519 0.503 0.487 0.471 0.456 0.442 0.428 0.414 0.401 0.388 0.376 0.364 0.352 0.341 0.33 0.32 0.309 0.3 0.29 0.281 0.272 0.263 0.255 0.247 0.239 0.231 0.224 0.217 0.21 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.981" PeakHeight="110.0" Num="3" Error="0.0">
-26.42 7.909 -1.197
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.981" EndFrequency="4.85" PeakHeight="288.691" Num="5" zHalfNm="227.601" Error="3.125">
-134.191 15.231 -13.802 6.573 -0.389
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="52.113" Depth="0.219"/>
<TopsideChapman PeakHeight="288.691" PeakDensity="291842.44" PeakScaleHeight="48.182" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
