<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-04 -035 01:00:00.000"
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: 45% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, 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" >
2026.02.04 (035) 01:00:00</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">
FF202603502040100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.136" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.634" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="365.894" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="309.404" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="266.663" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.229" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="61.818" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.797" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="31.939" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="57.290" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.590" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="140">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 9.3 9.35 9.4 9.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 250.000 250.000 248.333 246.667 245.000 260.000 250.000 250.000 247.500 245.000 240.000 240.000 242.500 245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 252.500 255.000 255.000 255.000 255.000 250.000 250.000 260.000 260.000 262.500 265.000 265.000 265.000 270.000 270.000 270.000 275.000 280.000 285.000 283.182 281.364 279.545 277.727 275.909 274.091 272.273 270.455 268.636 266.818 265.000 265.000 270.000 270.000 270.000 270.000 270.000 275.000 272.500 270.000 275.000 275.000 275.000 285.000 275.000 275.000 280.000 280.000 290.000 280.000 282.500 285.000 285.000 285.000 285.000 285.000 285.000 287.500 290.000 295.000 295.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 305.000 305.833 306.667 307.500 308.333 309.167 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 335.000 335.000 337.500 340.000 345.000 345.000 345.000 345.000 350.000 350.000 355.000 357.210 359.716 362.583 365.894 369.761 374.339 379.841 386.579 395.023 405.915 420.499
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 0 63 0 0 69 54 66 66 60 69 69 57 63 72 0 0 0 69 66 0 66 0 63 63 66 54 69 63 0 54 0 60 66 63 57 54 60 54 54 51 0 0 0 0 0 0 0 60 0 0 72 63 66 0 69 66 66 69 0 72 72 66 72 54 69 75 78 75 57 75 0 72 72 75 72 69 72 0 72 60 60 69 0 69 66 75 69 75 72 72 75 72 60 0 0 0 0 0 66 69 72 57 57 75 69 60 66 57 60 69 66 66 60 69 72 60 54 66 54 63 60 60 57 66 69 69 66 69 63 0 57 54 0 0 0 0 48 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 -1.171875 -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 2.734375 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 2.734375 -0.390625 -1.171875 -0.390625 -2.734375 -1.953125 -1.171875 -1.171875 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 -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 -2.734375 -2.734375 1.953125 -2.734375 -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 -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 -1.171875 -0.390625 -0.390625 0.390625 -1.171875 -2.734375 2.734375 2.734375 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="137">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 140.333 145.0 150.0 155.0 160.0 165.0 170.0 170.667 175.0 180.0 185.0 190.0 195.0 200.0 201.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 309.404 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.323 0.297 0.26 0.205 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.247 0.273 0.298 0.324 0.349 0.354 0.457 0.604 0.794 1.053 1.417 1.914 2.528 3.206 3.9 4.585 5.249 5.886 6.489 7.056 7.578 8.05 8.466 8.816 9.096 9.297 9.416 9.45 9.45 9.423 9.356 9.253 9.119 8.958 8.775 8.573 8.355 8.126 7.887 7.641 7.392 7.14 6.887 6.636 6.386 6.14 5.898 5.661 5.43 5.204 4.985 4.773 4.567 4.368 4.176 3.991 3.813 3.642 3.477 3.32 3.168 3.023 2.884 2.751 2.623 2.501 2.385 2.274 2.167 2.066 1.969 1.876 1.788 1.703 1.623 1.546 1.473 1.403 1.337 1.274 1.213 1.156 1.101 1.048 0.999 0.951 0.906 0.863 0.822 0.782 0.745 0.71 0.676 0.644 0.613 0.584 0.556 0.529 0.504 0.48 0.457 0.435 0.415 0.395 0.376 0.358 0.341 0.325 0.309 0.294 0.28 0.267 0.254 0.242 0.231 0.22 0.209

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="9.45" PeakHeight="309.404" Num="5" zHalfNm="266.663" Error="2.141">
-118.268 13.849 -3.812 -1.249 1.076
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="91.0" Depth="0.154"/>
<TopsideChapman PeakHeight="309.404" PeakDensity="1107971.5" PeakScaleHeight="31.939" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
