<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-28 -087 23:10:00.000"
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, F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match</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" >
2026.03.28 (087) 23:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608703282310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.085" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.917" 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="5.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="400.000" 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="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="357.278" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="334.693" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.959" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="35.769" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.030" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="16.860" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="48.720" 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="132">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 320.000 320.000 318.333 316.667 315.000 317.500 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 330.000 335.000 335.833 336.667 337.500 338.333 339.167 340.000 335.000 336.667 338.333 340.000 340.000 345.000 342.500 340.000 341.667 343.333 345.000 350.000 355.000 357.500 360.000 362.500 365.000 367.500 370.000 368.333 366.667 365.000 365.000 365.000 370.000 367.500 365.000 367.500 370.000 371.250 372.500 373.750 375.000 372.500 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 368.333 366.667 365.000 365.000 362.500 360.000 360.000 360.000 360.000 362.500 365.000 366.667 368.333 370.000 362.500 355.000 360.000 360.000 360.000 367.500 375.000 377.500 380.000 380.000 380.000 381.818 383.636 385.455 387.273 389.091 390.909 392.727 394.545 396.364 398.182 400.000 400.000 400.000 400.000 395.000 405.000 402.500 400.000 400.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 393.750 392.500 391.250 390.000 391.667 393.333 395.000 396.667 398.333 400.000 395.000 400.000 400.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 54 60 0 60 0 63 0 0 54 0 0 57 57 0 63 57 0 63 51 63 69 0 63 63 54 0 0 57 57 54 0 63 0 0 63 0 63 63 0 0 0 54 60 54 0 57 0 57 51 0 51 0 57 0 0 0 54 0 60 54 0 0 54 0 0 57 0 0 57 60 0 54 0 54 57 0 57 0 0 51 57 51 60 0 54 54 51 0 51 0 51 0 0 0 0 0 0 0 48 0 0 51 0 0 48 51 48 45 48 51 54 0 48 48 51 51 48 0 0 0 51 0 0 51 0 48 51 48 48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -2.734375 -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 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -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 1.953125 -0.390625 -0.390625 1.171875 0.390625 -0.390625 -0.390625 0.390625 -0.390625 1.953125 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 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 -2.734375 1.171875 2.734375 0.390625 0.390625 2.734375 0.390625 0.390625 -1.171875 0.390625 -0.390625 -1.171875 -1.171875 -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 -1.171875 -2.734375 0.390625 -1.953125 1.953125 -0.390625 -0.390625 -1.171875 -0.390625 0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="104">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.49 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.981 180.0 185.0 190.0 195.0 200.0 205.0 210.0 213.471 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 357.278 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.344 0.33 0.311 0.284 0.246 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.205 0.227 0.249 0.272 0.294 0.316 0.339 0.354 0.403 0.538 0.667 0.799 0.936 1.081 1.233 1.395 1.567 1.748 1.941 2.145 2.362 2.592 2.836 3.095 3.371 3.664 3.978 4.313 4.673 5.06 5.478 5.933 6.431 6.981 7.594 8.273 8.928 9.05 9.028 8.883 8.628 8.29 7.895 7.463 7.012 6.554 6.1 5.658 5.232 4.826 4.443 4.083 3.748 3.435 3.146 2.879 2.633 2.406 2.198 2.008 1.833 1.673 1.526 1.392 1.27 1.158 1.056 0.963 0.878 0.801 0.73 0.666 0.607 0.553 0.504 0.46 0.419 0.382 0.348 0.317 0.289 0.264 0.24 0.219

</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="357.278" Num="5" zHalfNm="334.693" Error="2.343">
-112.968 -51.384 23.65 -3.71 0.605
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="103.471" Depth="0.154"/>
<TopsideChapman PeakHeight="357.278" PeakDensity="1016160.06" PeakScaleHeight="16.86" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
