<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-03 -034 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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Moderate 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" >
2026.02.03 (034) 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">
FF202603402032340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.006" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.051" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="8.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="410.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="374.530" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="352.584" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.064" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="35.782" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.009" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="16.465" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="55.030" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="122">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
345.000 348.750 352.500 356.250 360.000 360.000 360.000 360.000 365.000 370.000 370.000 370.000 370.000 370.417 370.833 371.250 371.667 372.083 372.500 372.917 373.333 373.750 374.167 374.583 375.000 375.417 375.833 376.250 376.667 377.083 377.500 377.917 378.333 378.750 379.167 379.583 380.000 380.417 380.833 381.250 381.667 382.083 382.500 382.917 383.333 383.750 384.167 384.583 385.000 385.417 385.833 386.250 386.667 387.083 387.500 387.917 388.333 388.750 389.167 389.583 390.000 390.417 390.833 391.250 391.667 392.083 392.500 392.917 393.333 393.750 394.167 394.583 395.000 400.000 405.000 405.000 405.000 405.000 405.000 402.500 400.000 405.000 410.000 415.000 415.000 415.000 415.000 415.000 415.000 415.000 411.250 407.500 403.750 400.000 402.500 405.000 407.500 410.000 410.000 410.000 410.000 411.667 413.333 415.000 415.000 410.000 405.000 400.000 400.000 400.000 400.000 400.000 402.500 405.000 410.000 415.000 420.000 415.000 415.000 410.000 415.000 420.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 0 51 0 54 60 54 0 0 0 0 0 0 0 0 0 0 0 48 0 0 0 0 54 0 0 0 0 0 0 0 0 0 0 0 0 0 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 0 0 0 0 0 0 0 0 0 0 0 0 54 0 54 0 57 57 54 54 57 57 60 57 54 54 57 0 54 0 0 0 0 0 54 0 51 57 51 51 54 54 51 54 54 60 54 0 57 54 51 48 51 0 0 48 48 0 51 54 51 48 51 51 51 51 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 1.953125 1.171875 -1.953125 2.734375 0.390625 0.390625 1.171875 0.390625 1.171875 0.390625 1.171875 2.734375 1.171875 0.390625 0.390625 1.171875 -2.734375 1.171875 1.171875 -0.390625 -0.390625 -1.171875 2.734375 0.390625 1.171875 1.171875 -0.390625 2.734375 1.171875 2.734375 1.171875 2.734375 1.953125 1.953125 1.171875 -0.390625 -2.734375 0.390625 1.171875 0.390625 2.734375 1.171875 0.390625 1.953125 0.390625 2.734375 1.171875 1.953125 1.953125 1.171875 1.953125 1.171875 0.390625 0.390625 -1.171875 -0.390625 1.171875 2.734375 -1.171875 -2.734375 -2.734375 -1.171875 -2.734375 -2.734375 0.390625 0.390625 -1.171875 -0.390625 -1.171875 0.390625 -1.171875 -0.390625 -1.171875 1.953125 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 1.171875 -1.171875 -1.953125 0.390625 0.390625 -2.734375 0.390625 -1.171875 -1.953125 -0.390625 -1.953125 1.953125 1.171875 1.953125 -0.390625 0.390625 -1.171875 -1.171875 1.953125 1.171875 -0.390625 0.390625 1.953125 -0.390625 0.390625 -0.390625 1.171875 -1.953125 1.171875 0.390625 -1.171875 -1.171875 -2.734375 1.171875 1.171875 1.953125 1.953125 -0.390625 2.734375 1.953125 1.953125 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="107">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.833 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.666 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.499 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 374.53 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0
</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 0.201 0.224 0.246 0.268 0.29 0.312 0.334 0.354 0.364 0.485 0.625 0.768 0.911 1.054 1.199 1.346 1.497 1.651 1.811 1.976 2.147 2.325 2.511 2.705 2.907 3.12 3.344 3.58 3.829 4.093 4.374 4.674 4.995 5.343 5.72 6.133 6.592 7.11 7.71 8.426 9.0 8.999 8.91 8.693 8.379 7.995 7.566 7.111 6.645 6.181 5.727 5.289 4.872 4.478 4.108 3.763 3.443 3.147 2.874 2.622 2.391 2.18 1.986 1.809 1.648 1.5 1.366 1.243 1.131 1.029 0.936 0.852 0.775 0.705 0.641 0.583 0.531 0.483 0.439 0.399 0.363 0.33 0.3 0.273 0.248 0.226 0.206

</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="9.0" PeakHeight="374.53" Num="5" zHalfNm="352.584" Error="2.048">
-123.101 -63.683 32.366 -5.047 -0.566
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.499" Depth="0.154"/>
<TopsideChapman PeakHeight="374.53" PeakDensity="1004962.75" PeakScaleHeight="16.465" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
