<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 21:50:00.000"
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: 90% PACIFIC flags: One of F2 cusps was derived from the other</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" >
2026.03.01 (060) 21:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202606003012150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.467" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.796" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="2.900" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="90.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="565.000" 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="0.467" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="435.204" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="369.082" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.935" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.100" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="98.784" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="26.772" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.914" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="106.880" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.500" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="126">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.9 9.95 10.0 10.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 355.000 356.111 357.222 358.333 359.444 360.556 361.667 362.778 363.889 365.000 365.000 365.714 366.429 367.143 367.857 368.571 369.286 370.000 371.250 372.500 373.750 375.000 377.500 380.000 380.000 380.000 380.000 380.000 380.833 381.667 382.500 383.333 384.167 385.000 390.000 392.000 394.000 396.000 398.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 410.000 415.000 415.000 420.000 422.000 424.000 426.000 428.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 441.667 443.333 445.000 446.667 448.333 450.000 450.000 455.000 455.000 455.000 460.000 465.000 465.000 465.000 465.000 470.000 470.000 470.000 475.000 480.000 480.000 480.000 485.000 485.000 490.000 490.000 490.000 495.000 497.500 500.000 505.000 505.000 510.000 510.000 510.000 515.000 515.000 515.000 520.000 525.000 525.000 530.000 530.000 535.000 535.000 540.000 540.000 545.000 548.000 551.000 554.000 557.000 560.000 565.000 565.000 570.000 577.786
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 54 0 0 0 0 0 0 0 0 63 66 0 57 0 0 51 0 66 0 60 0 60 48 54 0 57 60 57 0 0 0 0 0 0 66 0 0 0 0 63 66 51 57 63 51 69 60 63 0 0 0 0 66 63 60 0 57 0 0 57 63 69 69 63 66 66 60 63 0 0 0 63 0 63 66 66 69 69 63 51 60 66 69 63 63 66 66 54 54 60 54 60 57 63 60 60 0 63 51 60 48 57 63 57 63 63 60 54 57 48 57 54 60 57 60 60 0 0 0 0 51 48 54 48 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 1.171875 -0.390625 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 2.734375 -0.390625 -2.734375 -0.390625 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="17">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
90.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 100.000 99.286 98.571 97.857 97.143 96.429 95.714 95.000 95.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 63 66 69 69 0 0 63 57 0 0 0 0 0 0 57 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.914 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.385 140.0 145.0 150.0 155.0 160.0 165.0 166.771 170.0 175.0 180.0 185.0 190.0 195.0 195.156 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 435.204 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.309 0.405 0.452 0.467 0.461 0.443 0.41 0.36 0.282 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.23 0.277 0.324 0.371 0.419 0.466 0.467 0.56 0.65 0.741 0.836 0.937 1.047 1.164 1.29 1.426 1.57 1.724 1.886 2.057 2.235 2.421 2.613 2.811 3.015 3.224 3.438 3.657 3.88 4.108 4.34 4.576 4.817 5.061 5.309 5.562 5.818 6.079 6.343 6.611 6.882 7.157 7.435 7.714 7.995 8.275 8.553 8.826 9.089 9.339 9.566 9.762 9.915 10.014 10.05 10.05 10.041 10.012 9.966 9.903 9.825 9.733 9.629 9.513 9.387 9.252 9.109 8.959 8.803 8.643 8.478 8.31 8.139 7.966 7.791 7.616 7.441 7.266 7.091 6.917 6.745 6.574 6.405 6.238 6.073 5.911 5.751 5.594 5.44 5.289 5.141 4.996 4.854 4.715 4.579 4.447 4.317 4.191 4.068 3.948 3.831 3.717 3.606 3.498 3.393 3.291 3.191 3.095 3.001 2.91 2.821 2.735 2.651 2.57 2.491 2.414 2.34 2.268 2.198 2.13 2.064 2.0 1.938 1.878 1.82 1.763 1.708 1.655 1.604 1.554 1.505 1.458 1.413 1.369 1.326 1.284 1.244 1.205 1.168 1.131 1.096 1.061 1.028 0.996 0.965 0.935 0.905 0.877 0.849 0.823 0.797 0.772 0.748 0.724 0.702 0.68 0.658 0.638 0.618 0.598 0.579 0.561 0.544 0.526 0.51 0.494 0.478 0.463 0.449

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.467" PeakHeight="110.0" Num="3" Error="0.0">
-21.72 3.974 -0.34
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.467" EndFrequency="10.05" PeakHeight="435.204" Num="5" zHalfNm="369.082" Error="4.587">
-222.391 -35.628 23.852 -8.726 2.845
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="85.156" Depth="0.267"/>
<TopsideChapman PeakHeight="435.204" PeakDensity="1253132.8" PeakScaleHeight="48.914" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
