<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 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" >
2026.03.30 (089) 23:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608903302350009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.670" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.163" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="405.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="405.000" 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="8.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="480.000" 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="2.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="448.677" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="422.641" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.591" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="42.546" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.238" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="20.790" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="74.280" 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" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
405.000 410.000 445.000 450.000 475.000 480.000 479.758 479.516 479.274 479.032 478.790 478.548 478.306 478.065 477.823 477.581 477.339 477.097 476.855 476.613 476.371 476.129 475.887 475.645 475.403 475.161 474.919 474.677 474.435 474.194 473.952 473.710 473.468 473.226 472.984 472.742 472.500 472.258 472.016 471.774 471.532 471.290 471.048 470.806 470.565 470.323 470.081 469.839 469.597 469.355 469.113 468.871 468.629 468.387 468.145 467.903 467.661 467.419 467.177 466.935 466.694 466.452 466.210 465.968 465.726 465.484 465.242 465.000 465.000 465.000 465.000 466.500 468.000 469.500 471.000 472.500 474.000 475.500 477.000 478.500 480.000 475.000 473.333 471.667 470.000 465.000 465.000 465.000 465.000 465.000 465.000 462.500 460.000 455.000 460.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 462.500 460.000 465.000 470.000 475.000 475.000 480.000 480.000 485.000 490.000 496.667 503.333 510.000 530.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 57 54 60 51 0 0 0 0 0 0 54 0 0 0 0 51 0 0 0 0 0 57 0 54 60 0 0 54 54 0 0 0 54 0 0 48 0 0 54 0 54 0 51 0 51 0 0 0 0 0 0 0 0 0 0 0 54 54 0 0 0 0 0 0 54 57 54 0 57 54 0 0 57 51 0 0 54 0 48 57 51 0 54 60 0 60 54 0 57 0 54 57 0 57 57 0 0 57 54 57 60 0 51 57 57 0 60 0 54 51 54 0 51 54 51 51 0 51 48 0 45 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -1.171875 0.390625 -2.734375 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 1.171875 -1.171875 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 1.953125 0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.953125 -1.953125 1.171875 -0.390625 -0.390625 -0.390625 1.171875 -2.734375 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -1.171875 0.390625 1.171875 -0.390625 -0.390625 -1.171875 -1.171875 0.390625 -0.390625 1.171875 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 2.734375 -2.734375 -0.390625 -0.390625 -1.171875 0.390625 -0.390625 -0.390625 -1.171875 -1.171875 1.171875 -0.390625 1.171875 0.390625 1.171875 -0.390625 0.390625 -1.171875 0.390625 0.390625 -1.171875 -0.390625 -1.171875 1.171875 -0.390625 0.390625 -2.734375 0.390625 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 -1.171875 -0.390625 0.390625 0.390625 -1.171875 0.390625 1.171875 0.390625 0.390625 -0.390625 1.171875 -1.171875 0.390625 -1.171875 1.171875 -0.390625 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="134">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.686 150.0 155.0 160.0 165.0 170.0 175.0 180.0 181.371 185.0 190.0 195.0 200.0 205.0 210.0 215.0 217.057 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 448.677 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0
</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 0.289 0.255 0.208 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.216 0.237 0.259 0.28 0.302 0.324 0.345 0.354 0.379 0.436 0.518 0.619 0.722 0.822 0.917 1.01 1.1 1.19 1.279 1.368 1.458 1.549 1.641 1.736 1.832 1.931 2.032 2.136 2.244 2.356 2.471 2.591 2.716 2.846 2.982 3.124 3.274 3.432 3.599 3.776 3.964 4.166 4.382 4.616 4.869 5.147 5.453 5.793 6.176 6.613 7.115 7.694 8.331 8.889 9.05 9.046 8.974 8.818 8.596 8.322 8.008 7.667 7.308 6.94 6.568 6.199 5.837 5.484 5.144 4.817 4.505 4.208 3.927 3.662 3.412 3.177 2.957 2.751 2.558 2.378 2.209 2.053 1.907 1.771 1.644 1.526 1.417 1.315 1.221 1.133 1.051 0.975 0.905 0.84 0.779 0.723 0.671 0.622 0.577 0.535 0.497 0.461 0.427 0.397 0.368 0.341 0.317 0.294 0.272 0.253 0.234 0.217 0.202

</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="9.05" PeakHeight="448.677" Num="5" zHalfNm="422.641" Error="8.551">
-170.297 -95.295 36.719 3.567 -6.314
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="107.057" Depth="0.154"/>
<TopsideChapman PeakHeight="448.677" PeakDensity="1016160.06" PeakScaleHeight="20.79" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
