<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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) 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">
FF202603202010100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.547" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.102" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.350" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="300.000" 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="3.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="293.571" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="273.954" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.229" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="29.631" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.587" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="14.657" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="33.260" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.310" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="126">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 295.000 292.500 290.000 290.000 285.000 285.000 285.000 285.000 280.000 280.000 280.000 270.000 270.000 265.000 266.667 268.333 270.000 265.000 260.000 255.000 250.000 254.286 258.571 262.857 267.143 271.429 275.714 280.000 280.000 280.000 282.500 285.000 285.000 290.000 295.000 293.333 291.667 290.000 291.250 292.500 293.750 295.000 290.000 287.500 285.000 284.545 284.091 283.636 283.182 282.727 282.273 281.818 281.364 280.909 280.455 280.000 275.000 280.000 275.000 275.000 270.000 271.000 272.000 273.000 274.000 275.000 275.000 275.000 280.000 281.154 282.308 283.462 284.615 285.769 286.923 288.077 289.231 290.385 291.538 292.692 293.846 295.000 310.000 307.500 305.000 300.000 305.000 307.143 309.286 311.429 313.571 315.714 317.857 320.000 322.500 325.000 325.000 325.000 330.000 335.000 340.000 345.000 350.000 355.000 360.000 354.091 348.182 342.273 336.364 330.455 324.545 318.636 312.727 306.818 300.909 295.000 295.000 300.000 300.000 300.000 305.000 310.000 318.810 335.486 379.049
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 57 60 60 63 0 0 57 63 60 63 66 69 60 0 0 69 0 63 54 60 60 0 0 0 0 0 66 0 66 0 63 57 63 57 0 60 60 0 0 0 63 57 0 57 54 0 60 57 57 0 57 0 0 0 57 57 57 60 60 54 0 0 0 0 57 0 54 54 0 0 0 0 0 0 0 0 0 0 0 60 57 60 0 63 57 60 60 0 0 0 0 0 57 0 60 57 54 51 0 54 0 0 0 51 0 0 0 0 51 60 54 54 0 0 51 48 57 60 57 57 54 57 57 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 1.953125 1.953125 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 -1.171875 1.171875 -1.171875 1.171875 -0.390625 1.171875 1.171875 1.171875 1.171875 -0.390625 0.390625 -0.390625 -0.390625 -1.171875 -0.390625 1.171875 1.171875 1.171875 -1.171875 1.171875 -1.171875 1.171875 -1.171875 -1.171875 -1.171875 -1.953125 1.171875 -1.171875 -1.171875 1.171875 1.171875 -0.390625 -1.171875 -0.390625 1.953125 -1.171875 -1.953125 1.953125 1.953125 -1.171875 -1.171875 1.171875 -1.171875 1.953125 1.171875 -1.171875 -0.390625 0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 0.390625 0.390625 0.390625 -0.390625 -0.390625 1.953125 1.171875 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 2.734375 1.171875 2.734375 1.953125 1.171875 1.171875 -0.390625 1.171875 0.390625 1.171875 1.171875 -0.390625 -0.390625 0.390625 -0.390625 -1.953125 -2.734375 1.171875 1.953125 1.171875 1.171875 0.390625 1.171875 2.734375 1.171875 2.734375 2.734375 -1.953125 1.171875 2.734375 -0.390625 1.171875 1.171875 1.953125 1.953125 1.171875 0.390625 1.953125 -0.390625 1.953125 1.953125 1.171875 1.953125 1.171875 1.953125 1.171875 1.953125 1.953125 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="86">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.667 145.0 150.0 155.0 160.0 165.0 170.0 175.0 175.333 180.0 185.0 190.0 195.0 200.0 205.0 208.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 293.571 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.328 0.306 0.275 0.231 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.246 0.269 0.293 0.316 0.34 0.354 0.429 0.626 0.854 1.122 1.435 1.794 2.202 2.66 3.169 3.732 4.352 5.032 5.772 6.571 7.412 8.239 8.882 9.05 9.042 8.896 8.602 8.202 7.732 7.223 6.698 6.174 5.663 5.175 4.714 4.283 3.883 3.515 3.177 2.869 2.589 2.334 2.103 1.894 1.705 1.535 1.381 1.242 1.117 1.005 0.904 0.813 0.731 0.657 0.591 0.531 0.477 0.429 0.386 0.347 0.312 0.28 0.252 0.226 0.204

</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="9.05" PeakHeight="293.571" Num="5" zHalfNm="273.954" Error="4.393">
-74.829 -17.818 8.531 -1.9 0.445
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="98.0" Depth="0.154"/>
<TopsideChapman PeakHeight="293.571" PeakDensity="1016160.06" PeakScaleHeight="14.657" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
