<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 23:40:00.000"
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 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Severe F-spread, F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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) 23:40:00</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">
FF202603202012340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.231" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.206" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="370.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="332.625" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="309.610" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.064" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="36.019" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.456" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="16.969" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="44.570" 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="114">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 300.000 302.857 305.714 308.571 311.429 314.286 317.143 320.000 325.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 333.000 331.000 329.000 327.000 325.000 325.000 325.000 325.192 325.385 325.577 325.769 325.962 326.154 326.346 326.538 326.731 326.923 327.115 327.308 327.500 327.692 327.885 328.077 328.269 328.462 328.654 328.846 329.038 329.231 329.423 329.615 329.808 330.000 332.500 335.000 337.500 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 355.000 353.889 352.778 351.667 350.556 349.444 348.333 347.222 346.111 345.000 345.000 345.000 345.000 346.667 348.333 350.000 350.000 347.500 345.000 355.000 362.500 370.000 370.000 370.000 372.500 375.000 375.000 372.500 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 375.000 378.333 381.667 385.000 375.000 380.000 378.000 376.000 374.000 372.000 370.000 370.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 0 0 0 0 0 0 51 66 63 63 57 54 0 60 57 0 0 54 54 54 0 0 57 57 0 60 54 0 0 0 0 0 0 63 0 0 0 0 57 0 0 63 57 0 0 57 0 0 0 57 0 0 54 54 0 54 57 54 57 57 54 57 57 60 57 0 57 54 0 0 0 0 63 0 57 51 57 57 57 60 57 54 60 54 57 0 54 57 57 57 54 57 54 48 48 0 48 48 54 51 51 0 48 51 51 54 54 0 54 0 51 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 2.734375 -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 1.171875 1.171875 -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 1.171875 0.390625 2.734375 -0.390625 0.390625 -0.390625 -0.390625 -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 -1.171875 -0.390625 -2.734375 2.734375 1.953125 1.953125 -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 -1.171875 -0.390625 -0.390625 0.390625 -1.171875 -0.390625 -0.390625 1.171875 -0.390625 -0.390625 1.171875 0.390625 -0.390625 1.171875 -0.390625 -0.390625 -1.171875 -0.390625 2.734375 -1.171875 -1.171875 1.171875 -0.390625 -1.953125 -0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="100">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.82 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.64 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.46 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 332.625 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.312 0.285 0.249 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.224 0.246 0.268 0.29 0.312 0.334 0.354 0.369 0.525 0.715 0.933 1.17 1.423 1.69 1.968 2.26 2.564 2.882 3.215 3.564 3.931 4.317 4.727 5.161 5.623 6.12 6.655 7.236 7.872 8.561 9.208 9.35 9.333 9.193 8.94 8.6 8.199 7.759 7.297 6.827 6.36 5.904 5.464 5.045 4.648 4.275 3.926 3.602 3.301 3.023 2.766 2.53 2.313 2.114 1.931 1.763 1.61 1.47 1.341 1.224 1.117 1.019 0.93 0.848 0.774 0.706 0.644 0.588 0.536 0.489 0.446 0.407 0.371 0.338 0.309 0.281 0.257 0.234 0.213

</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="9.35" PeakHeight="332.625" Num="5" zHalfNm="309.61" Error="2.255">
-99.812 -34.428 21.606 -6.359 0.828
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.46" Depth="0.154"/>
<TopsideChapman PeakHeight="332.625" PeakDensity="1084646.4" PeakScaleHeight="16.969" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
