<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 23:50:00.000"
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" >
2026.03.13 (072) 23:50:00</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">
FF202607203132350009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.231" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.821" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="370.000" 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="4.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="349.418" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="336.097" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.591" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="23.111" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.468" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="10.583" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="44.190" 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="124">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
390.000 385.000 380.000 382.500 385.000 384.333 383.667 383.000 382.333 381.667 381.000 380.333 379.667 379.000 378.333 377.667 377.000 376.333 375.667 375.000 370.000 368.333 366.667 365.000 365.000 365.000 365.000 365.217 365.435 365.652 365.870 366.087 366.304 366.522 366.739 366.957 367.174 367.391 367.609 367.826 368.043 368.261 368.478 368.696 368.913 369.130 369.348 369.565 369.783 370.000 367.500 365.000 365.000 367.500 370.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 372.500 375.000 372.500 370.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 51 0 48 0 0 0 0 0 51 0 0 0 0 0 0 0 0 54 54 51 0 54 54 0 54 0 54 54 54 0 0 0 0 0 0 51 0 0 0 0 0 60 0 0 0 0 0 60 0 57 57 0 60 63 0 66 60 66 60 60 60 57 60 63 60 0 63 60 0 0 0 0 0 0 60 60 63 60 60 66 63 57 66 0 66 66 60 66 60 66 60 63 60 60 57 0 60 54 60 60 60 57 60 63 63 60 63 60 60 57 63 0 0 60 63 60 0 60 0 60 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 -1.953125 -1.171875 -2.734375 -2.734375 -1.953125 -0.390625 1.171875 1.171875 -2.734375 0.390625 1.953125 -0.390625 0.390625 1.171875 -1.953125 0.390625 -0.390625 -1.171875 1.171875 1.953125 1.171875 -0.390625 1.171875 0.390625 1.953125 1.953125 2.734375 2.734375 1.171875 -0.390625 1.171875 1.171875 -1.953125 1.171875 1.171875 0.390625 1.953125 -1.171875 1.171875 1.171875 0.390625 -0.390625 1.171875 1.171875 -2.734375 0.390625 1.171875 1.171875 1.171875 0.390625 1.953125 1.953125 0.390625 -1.171875 1.953125 1.953125 1.171875 1.171875 1.953125 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 1.171875 1.953125 1.171875 0.390625 0.390625 -1.953125 -1.953125 1.953125 0.390625 1.171875 -0.390625 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 0.390625 2.734375 2.734375 2.734375 1.953125 2.734375 1.953125 1.171875 1.953125 2.734375 1.953125 1.953125 1.171875 2.734375 1.953125 1.171875 2.734375 1.171875 1.171875 1.953125 0.390625 1.953125 1.171875 1.953125 2.734375 2.734375 2.734375 1.953125 2.734375 1.171875 1.953125 2.734375 1.171875 1.953125 1.953125 1.953125 1.171875 -2.734375 1.953125 -0.390625 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="86">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.529 150.0 155.0 160.0 165.0 170.0 175.0 180.0 181.057 185.0 190.0 195.0 200.0 205.0 210.0 215.0 216.586 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 349.418 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0
</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 0.332 0.314 0.288 0.254 0.206 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.217 0.239 0.26 0.282 0.304 0.325 0.347 0.354 0.417 0.591 0.823 1.037 1.235 1.426 1.615 1.806 2.001 2.201 2.409 2.625 2.852 3.09 3.342 3.61 3.896 4.204 4.536 4.898 5.296 5.74 6.242 6.823 7.525 8.444 9.85 9.847 9.612 9.092 8.399 7.625 6.833 6.063 5.342 4.682 4.086 3.556 3.088 2.677 2.318 2.005 1.733 1.497 1.293 1.117 0.964 0.832 0.718 0.62 0.535 0.461 0.398 0.343 0.296 0.256 0.221

</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="9.85" PeakHeight="349.418" Num="5" zHalfNm="336.097" Error="4.677">
-97.444 -60.545 31.649 -4.297 -2.195
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="106.586" Depth="0.154"/>
<TopsideChapman PeakHeight="349.418" PeakDensity="1203753.1" PeakScaleHeight="10.583" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
