<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-11 -070 00:50:00.000"
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" >
2026.03.11 (070) 00:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202607003110050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.933" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.837" 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="7.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="380.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="380.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" 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="4.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="386.717" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="365.608" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.125" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="33.394" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.270" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="17.008" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="53.180" 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="125">
<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 9.05 9.1 9.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
465.000 445.000 440.000 423.333 406.667 390.000 405.000 400.000 395.000 394.643 394.286 393.929 393.571 393.214 392.857 392.500 392.143 391.786 391.429 391.071 390.714 390.357 390.000 390.000 390.000 390.000 390.000 390.000 390.000 385.000 385.000 385.000 383.750 382.500 381.250 380.000 385.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 390.238 390.476 390.714 390.952 391.190 391.429 391.667 391.905 392.143 392.381 392.619 392.857 393.095 393.333 393.571 393.810 394.048 394.286 394.524 394.762 395.000 395.000 395.000 390.000 390.000 390.000 390.000 390.000 387.500 385.000 383.333 381.667 380.000 381.765 383.529 385.294 387.059 388.824 390.588 392.353 394.118 395.882 397.647 399.412 401.176 402.941 404.706 406.471 408.235 410.000 400.000 405.000 405.000 407.500 410.000 410.000 410.000 410.000 410.000 410.000 407.500 405.000 407.273 409.545 411.818 414.091 416.364 418.636 420.909 423.182 425.455 427.727 430.000 430.000 430.000 430.000 432.500 435.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 60 51 0 0 60 60 0 60 0 0 57 0 0 0 0 0 54 0 51 0 0 54 51 60 0 0 63 60 66 57 63 0 0 0 57 0 60 0 0 57 54 0 0 54 60 51 0 0 63 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 48 0 57 54 0 57 0 57 0 57 0 0 48 51 0 0 48 0 0 0 0 0 0 0 0 0 0 51 45 57 48 54 54 0 51 48 51 0 0 51 48 45 0 0 0 0 48 51 0 0 48 45 45 0 48 51 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 0.390625 1.171875 -1.953125 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 1.953125 -0.390625 -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 1.171875 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 1.171875 0.390625 1.953125 0.390625 0.390625 1.953125 0.390625 2.734375 0.390625 0.390625 0.390625 0.390625 1.171875 1.953125 -0.390625 1.953125 -0.390625 0.390625 0.390625 -1.953125 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 1.953125 1.171875 1.953125 1.171875 -2.734375 -0.390625 -1.953125 -2.734375 -1.171875 -0.390625 0.390625 2.734375 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 -0.390625 2.734375 0.390625 1.953125 -0.390625 0.390625 1.171875 2.734375 0.390625 0.390625 1.171875 -1.953125 0.390625 1.953125 1.953125 1.171875 1.171875 1.953125 1.171875 -1.953125 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="111">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.701 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.402 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 220.103 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 386.717 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0
</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 0.333 0.316 0.293 0.261 0.218 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.207 0.228 0.249 0.27 0.291 0.312 0.333 0.354 0.354 0.422 0.535 0.675 0.811 0.939 1.061 1.182 1.302 1.423 1.546 1.673 1.804 1.94 2.082 2.23 2.387 2.553 2.73 2.918 3.121 3.341 3.581 3.844 4.136 4.465 4.838 5.269 5.778 6.388 7.122 7.956 8.714 9.12 9.15 9.118 8.96 8.695 8.352 7.952 7.518 7.064 6.605 6.151 5.708 5.281 4.875 4.491 4.131 3.794 3.481 3.19 2.922 2.674 2.446 2.236 2.044 1.867 1.706 1.558 1.422 1.298 1.185 1.082 0.987 0.901 0.822 0.75 0.684 0.624 0.57 0.52 0.474 0.433 0.395 0.36 0.328 0.3 0.273 0.249 0.227 0.208

</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="9.15" PeakHeight="386.717" Num="5" zHalfNm="365.608" Error="7.572">
-125.506 -62.045 20.307 5.962 -5.332
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="110.103" Depth="0.154"/>
<TopsideChapman PeakHeight="386.717" PeakDensity="1038740.7" PeakScaleHeight="17.008" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
