<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 00:10:00.000"
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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, 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" >
2026.03.13 (072) 00:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607203130010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.224" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.757" 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="8.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" 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="7.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="346.570" 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="2.950" 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="324.207" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="300.538" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.435" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="35.655" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.828" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="18.090" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="40.780" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.210" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="108">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 310.000 310.000 310.000 310.000 310.000 312.500 315.000 312.500 310.000 312.500 315.000 315.000 316.250 317.500 318.750 320.000 320.000 320.000 320.000 317.500 315.000 312.500 310.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 321.667 323.333 325.000 326.667 328.333 330.000 327.500 325.000 325.000 322.500 320.000 320.435 320.870 321.304 321.739 322.174 322.609 323.043 323.478 323.913 324.348 324.783 325.217 325.652 326.087 326.522 326.957 327.391 327.826 328.261 328.696 329.130 329.565 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 331.667 333.333 335.000 335.556 336.111 336.667 337.222 337.778 338.333 338.889 339.444 340.000 340.556 342.233 344.209 346.570 349.442 353.010 357.563 363.573 371.875 384.084 403.813
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 0 63 63 60 0 57 54 63 0 63 63 0 0 0 54 60 0 51 0 0 57 54 60 66 63 66 57 57 0 60 54 0 0 57 54 0 0 0 0 54 51 57 57 51 57 0 0 0 57 57 0 57 57 54 0 0 0 0 60 0 0 60 57 0 0 0 0 57 57 0 0 60 0 63 60 63 63 0 60 57 60 57 51 0 0 60 0 0 0 0 57 60 63 66 63 63 63 57 60 60 54 51 57 57 0 48
</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 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 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 1.171875 -0.390625 0.390625 -0.390625 -0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 -0.390625 -0.390625 1.171875 1.171875 1.171875 0.390625 1.953125 0.390625 0.390625 0.390625 1.171875 -0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 0.390625 1.171875 1.953125 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 1.953125 -2.734375 -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 -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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.997 150.0 155.0 160.0 165.0 170.0 175.0 180.0 181.995 185.0 190.0 195.0 200.0 205.0 210.0 215.0 217.992 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 324.207 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.332 0.315 0.29 0.257 0.211 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.234 0.256 0.277 0.298 0.32 0.341 0.354 0.391 0.532 0.734 0.955 1.181 1.414 1.659 1.92 2.201 2.505 2.839 3.207 3.616 4.073 4.586 5.16 5.797 6.482 7.171 7.777 8.184 8.3 8.298 8.223 8.048 7.797 7.488 7.139 6.765 6.377 5.986 5.598 5.219 4.853 4.504 4.171 3.857 3.563 3.287 3.03 2.79 2.568 2.362 2.172 1.997 1.835 1.685 1.548 1.421 1.305 1.197 1.099 1.009 0.926 0.849 0.779 0.715 0.656 0.602 0.552 0.506 0.465 0.426 0.391 0.359 0.329 0.302 0.277 0.254 0.233 0.214

</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="8.3" PeakHeight="324.207" Num="5" zHalfNm="300.538" Error="2.669">
-92.313 -22.057 9.466 0.33 -1.641
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="107.992" Depth="0.154"/>
<TopsideChapman PeakHeight="324.207" PeakDensity="854714.6" PeakScaleHeight="18.09" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
