<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 20:50:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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" >
2026.03.22 (081) 20:50:00</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">
FF202608103222050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.528" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.810" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.500" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" Name="h`Es" 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="10.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="527.459" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.451" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="385.341" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="297.880" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.525" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.000" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="124.219" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.140" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.815" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="137.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.500" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="4.300" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="135">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 285.000 287.500 290.000 290.000 290.000 290.000 290.000 295.000 290.000 290.000 292.500 295.000 295.000 295.000 295.000 300.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 313.333 316.667 320.000 317.500 315.000 320.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 337.500 340.000 340.000 340.000 345.000 345.000 345.000 347.500 350.000 352.500 355.000 360.000 360.000 360.000 365.000 366.875 368.750 370.625 372.500 374.375 376.250 378.125 380.000 380.000 380.000 385.000 385.000 385.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 407.500 410.000 412.500 415.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 440.000 440.000 440.000 445.000 450.000 452.500 455.000 450.000 455.000 455.000 460.000 465.000 465.000 470.000 471.667 473.333 475.000 476.667 478.333 480.000 485.000 490.000 495.000 495.000 497.500 500.000 502.500 505.000 506.837 508.864 511.114 513.625 516.445 519.635 523.272 527.459 532.330 538.066 544.923 553.263 563.625 576.847 594.304
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 51 0 51 54 0 0 0 54 54 48 0 54 54 0 48 57 45 54 0 0 48 0 0 54 54 0 0 51 0 57 0 57 57 60 60 0 60 66 57 57 0 51 60 57 60 66 66 0 0 0 69 57 57 63 51 0 0 0 0 0 0 0 57 63 69 63 0 63 0 60 63 60 0 63 63 0 57 0 60 60 63 63 69 72 63 60 66 66 60 57 0 57 69 75 69 57 0 51 66 69 63 66 60 57 45 0 0 0 0 0 51 54 54 45 48 0 0 0 48 48 0 45 51 48 45 0 42 0 45 0 48 48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.171875 2.734375 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -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 2.734375 -0.390625 -0.390625 2.734375 -0.390625 2.734375 -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 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -2.734375 1.953125 -0.390625 -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 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 1.953125 0.390625 -0.390625 1.171875 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="31">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 110.000 110.000 110.000 105.000 110.000 100.000 101.250 102.500 103.750 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 110.000 107.500 105.000 100.000 100.000 100.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 0 0 57 0 63 66 0 0 0 63 60 60 60 0 0 0 48 48 0 0 0 0 54 45 0 51 45 0 48
</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 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 0.390625 1.171875 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.958 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.634 125.0 130.0 133.269 135.0 140.0 144.903 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 385.341 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.204 0.97 1.257 1.404 1.451 1.424 1.342 1.302 1.302 1.302 1.302 1.324 1.388 1.451 1.455 1.623 1.768 1.907 2.047 2.192 2.344 2.505 2.675 2.856 3.048 3.251 3.465 3.687 3.917 4.152 4.391 4.632 4.873 5.114 5.353 5.591 5.827 6.061 6.293 6.524 6.752 6.978 7.204 7.428 7.65 7.872 8.093 8.313 8.533 8.752 8.97 9.187 9.403 9.618 9.829 10.037 10.238 10.429 10.606 10.761 10.886 10.968 11.0 11.0 10.994 10.975 10.944 10.902 10.848 10.785 10.711 10.629 10.539 10.441 10.337 10.226 10.109 9.988 9.861 9.73 9.596 9.459 9.319 9.176 9.032 8.886 8.738 8.59 8.441 8.291 8.142 7.993 7.843 7.695 7.547 7.4 7.254 7.109 6.966 6.824 6.683 6.544 6.407 6.272 6.138 6.006 5.876 5.748 5.622 5.498 5.377 5.257 5.139 5.024 4.91 4.799 4.689 4.582 4.477 4.374 4.273 4.174 4.077 3.982 3.889 3.798 3.709 3.621 3.536 3.452 3.371 3.291 3.212 3.136 3.061 2.988 2.917 2.847 2.779 2.712 2.647 2.583 2.521 2.46 2.401 2.343 2.286 2.231 2.177 2.124 2.073 2.022 1.973 1.925 1.879 1.833 1.788 1.745 1.702 1.661 1.62 1.581 1.542 1.505 1.468 1.432 1.397 1.363 1.33 1.297 1.266 1.235 1.204 1.175 1.146 1.118 1.091 1.064 1.038 1.013 0.988 0.964 0.94 0.917 0.895 0.873 0.851

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.451" PeakHeight="110.0" Num="3" Error="0.0">
-28.006 9.739 -1.775
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.451" EndFrequency="11.0" PeakHeight="385.341" Num="5" zHalfNm="297.88" Error="4.273">
-219.081 -38.038 23.957 -11.773 4.497
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="34.903" Depth="0.149"/>
<TopsideChapman PeakHeight="385.341" PeakDensity="1501240.8" PeakScaleHeight="62.815" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
