<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-19 -078 01:20:00.000"
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, 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" >
2026.03.19 (078) 01:20:00</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">
FF202607803190120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.092" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.261" 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="7.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="7.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="381.285" 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="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="335.674" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="304.994" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.853" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="45.741" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.445" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="22.912" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="49.960" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.460" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="95">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 280.000 282.500 285.000 286.667 288.333 290.000 300.000 295.000 290.000 285.000 300.000 310.000 310.000 315.000 320.000 320.526 321.053 321.579 322.105 322.632 323.158 323.684 324.211 324.737 325.263 325.789 326.316 326.842 327.368 327.895 328.421 328.947 329.474 330.000 330.526 331.053 331.579 332.105 332.632 333.158 333.684 334.211 334.737 335.263 335.789 336.316 336.842 337.368 337.895 338.421 338.947 339.474 340.000 340.526 341.053 341.579 342.105 342.632 343.158 343.684 344.211 344.737 345.263 345.789 346.316 346.842 347.368 347.895 348.421 348.947 349.474 350.000 355.000 355.000 355.000 357.500 360.000 355.000 355.000 355.000 357.500 360.000 365.000 370.000 365.000 370.000 373.333 375.359 377.926 381.285 385.872 392.507 402.959 421.849
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 0 57 0 0 60 60 0 0 63 57 60 63 0 63 0 0 0 0 0 0 57 0 0 54 0 0 0 0 0 0 0 0 0 0 57 0 0 0 54 0 0 0 54 0 0 0 0 51 0 0 0 0 54 0 0 0 0 0 0 48 0 0 0 0 0 0 0 0 0 0 0 51 0 54 57 66 54 54 60 63 60 60 57 60 63 51 57 51 0 0 0 51 54
</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 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 1.953125 1.171875 0.390625 1.953125 1.953125 0.390625 1.953125 -1.171875 0.390625 -1.953125 0.390625 -1.171875 1.171875 -1.953125 1.171875 -1.953125 -1.953125 -1.953125 1.171875 1.953125 1.171875 1.953125 2.734375 1.171875 1.953125 -1.953125 0.390625 -1.171875 -1.953125 1.171875 -1.953125 1.953125 1.171875 -1.953125 2.734375 2.734375 1.953125 -2.734375 2.734375 -1.171875 -1.953125 -0.390625 -1.953125 1.953125 -1.953125 1.953125 1.171875 1.171875 1.953125 1.171875 1.953125 1.953125 2.734375 -1.953125 2.734375 2.734375 -1.171875 -1.953125 -1.171875 0.390625 -0.390625 -1.953125 -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 1.953125 2.734375 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="114">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.137 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.273 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 221.41 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 335.674 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0
</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 0.334 0.317 0.294 0.264 0.222 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.203 0.224 0.244 0.265 0.286 0.307 0.327 0.348 0.354 0.436 0.57 0.73 0.912 1.117 1.343 1.588 1.852 2.135 2.436 2.757 3.098 3.458 3.838 4.238 4.657 5.092 5.538 5.985 6.415 6.796 7.076 7.198 7.2 7.176 7.094 6.962 6.789 6.585 6.356 6.11 5.851 5.586 5.318 5.051 4.787 4.528 4.276 4.033 3.799 3.575 3.36 3.156 2.963 2.779 2.606 2.442 2.287 2.142 2.005 1.876 1.755 1.642 1.536 1.436 1.342 1.255 1.173 1.096 1.025 0.958 0.895 0.836 0.781 0.73 0.682 0.637 0.595 0.556 0.52 0.485 0.453 0.424 0.396 0.37 0.345 0.323 0.301 0.281 0.263 0.246 0.229 0.214 0.2

</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="7.2" PeakHeight="335.674" Num="5" zHalfNm="304.994" Error="1.465">
-104.26 -17.563 9.881 -2.622 0.3
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="111.41" Depth="0.154"/>
<TopsideChapman PeakHeight="335.674" PeakDensity="643176.2" PeakScaleHeight="22.912" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
