<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, F2o 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, Trace overlaps while constructing baseline</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" >
2026.03.15 (074) 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">
FF202607403150010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.168" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.724" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.050" 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="0.550" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="377.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="348.939" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="324.106" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.435" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="38.576" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.018" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="18.444" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="47.250" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="113">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 376.667 373.333 370.000 357.500 345.000 339.000 333.000 327.000 321.000 315.000 315.000 310.000 310.000 310.000 305.000 302.500 300.000 300.000 301.667 303.333 305.000 310.000 320.000 321.667 323.333 325.000 326.667 328.333 330.000 331.667 333.333 335.000 335.000 335.000 335.000 340.000 345.000 350.000 352.500 355.000 358.333 361.667 365.000 365.000 365.000 362.500 360.000 355.000 350.000 350.441 350.882 351.324 351.765 352.206 352.647 353.088 353.529 353.971 354.412 354.853 355.294 355.735 356.176 356.618 357.059 357.500 357.941 358.382 358.824 359.265 359.706 360.147 360.588 361.029 361.471 361.912 362.353 362.794 363.235 363.676 364.118 364.559 365.000 363.750 362.500 361.250 360.000 360.000 360.000 360.000 350.000 360.000 360.000 425.000 425.000 435.000 430.000 425.000 421.000 417.000 413.000 409.000 405.000 401.000 397.000 393.000 389.000 385.000 381.000 377.000 389.685 423.293
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 0 0 60 0 60 69 66 51 54 0 54 51 54 0 54 54 54 66 0 60 60 63 63 60 54 60 63 54 57 51 0 0 57 60 57 54 0 54 54 54 54 0 57 0 57 54 54 51 57 0 51 0 0 0 0 0 54 0 0 54 51 0 0 54 0 0 54 0 54 0 0 0 0 57 54 0 57 54 0 0 54 0 0 0 54 0 60 63 60 60 63 48 51 54 0 51 0 54 54 0 51 48 51 0 60 0 51 51 54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.171875 -0.390625 -1.171875 -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 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 0.390625 1.953125 0.390625 -0.390625 -1.953125 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -1.953125 0.390625 0.390625 0.390625 -2.734375 0.390625 0.390625 0.390625 -0.390625 -0.390625 -1.953125 -0.390625 0.390625 0.390625 0.390625 -0.390625 -1.171875 2.734375 0.390625 0.390625 0.390625 1.953125 0.390625 0.390625 1.953125 -1.171875 0.390625 -0.390625 -2.734375 -2.734375 0.390625 1.171875 1.171875 1.953125 0.390625 0.390625 1.171875 -0.390625 -1.171875 -1.171875 -2.734375 -1.171875 0.390625 1.171875 0.390625 1.171875 0.390625 -2.734375 1.171875 1.953125 0.390625 -1.171875 0.390625 0.390625 0.390625 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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.016 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.033 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.049 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 348.939 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 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 0.255 0.277 0.298 0.32 0.341 0.354 0.412 0.555 0.703 0.861 1.03 1.211 1.404 1.611 1.831 2.064 2.311 2.573 2.85 3.143 3.454 3.784 4.134 4.507 4.905 5.33 5.786 6.278 6.809 7.382 7.987 8.547 8.75 8.747 8.664 8.482 8.222 7.903 7.544 7.158 6.758 6.353 5.952 5.558 5.178 4.813 4.466 4.137 3.828 3.538 3.267 3.014 2.779 2.561 2.359 2.172 1.999 1.84 1.692 1.557 1.432 1.316 1.21 1.112 1.023 0.94 0.864 0.794 0.73 0.67 0.616 0.566 0.52 0.478 0.439 0.404 0.371 0.341 0.313 0.288 0.264 0.243 0.223 0.205

</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="8.75" PeakHeight="348.939" Num="5" zHalfNm="324.106" Error="5.371">
-108.383 -39.223 20.393 -4.449 0.772
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.049" Depth="0.154"/>
<TopsideChapman PeakHeight="348.939" PeakDensity="949906.94" PeakScaleHeight="18.444" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
