<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 15:30:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 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" >
2026.03.22 (081) 15:30:00</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">
FF202608103221530009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.360" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.546" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.050" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.360" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="200.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="200.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="100.558" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="96.261" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="6.105" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="525.000" 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="3.399" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.364" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="379.815" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="245.461" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.454" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="171.319" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.945" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="94.629" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="216.650" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.340" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
200.000 200.000 205.000 211.667 218.333 225.000 231.667 238.333 245.000 251.667 258.333 265.000 275.000 280.000 285.000 290.000 295.000 295.000 300.000 305.000 307.500 310.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 327.500 330.000 330.000 330.000 330.000 335.000 337.000 339.000 341.000 343.000 345.000 347.000 349.000 351.000 353.000 355.000 360.000 360.000 362.500 365.000 367.500 370.000 372.500 375.000 377.500 380.000 380.000 382.500 385.000 387.500 390.000 395.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 420.000 422.500 425.000 425.000 430.000 435.000 440.000 445.000 445.000 450.000 455.000 460.000 465.000 465.000 475.000 475.000 480.000 480.000 490.000 495.000 500.000 500.000 505.000 505.000 515.000 515.000 520.000 525.000 525.000 530.000 535.000 545.000 545.000 550.000 555.000 560.000 565.000 575.000 580.000 585.742 592.003 598.857 606.392 614.715 623.957 634.277 645.878 659.013 674.009
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 51 48 0 0 0 0 0 0 48 0 51 48 45 0 0 45 45 51 51 0 48 48 48 51 57 54 54 57 54 63 63 60 0 54 54 57 60 60 0 0 0 0 0 0 0 0 0 63 51 57 0 54 0 51 0 45 0 45 51 0 48 0 57 63 57 63 57 54 63 60 63 57 0 45 57 60 60 57 60 63 63 63 66 66 66 63 66 63 66 66 63 63 69 69 60 57 60 57 45 48 51 57 54 57 57 51 48 51 54 51 0 48 51 48 54 54 48 48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -0.390625 0.390625 2.734375 -2.734375 1.171875 0.390625 -2.734375 -0.390625 -1.953125 0.390625 0.390625 0.390625 1.953125 -1.171875 -0.390625 -0.390625 0.390625 0.390625 -1.953125 -0.390625 -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 -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 -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 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 -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 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="7">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.05 3.1 3.15 3.2 3.25 3.3 3.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.558 101.174 101.848 102.592 103.425 104.371 105.471
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 0 0 0 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 0.390625 -0.390625 1.953125 -0.390625 -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" >
90.0 95.0 96.261 97.774 99.286 100.0 100.799 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 379.815 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.286 3.36 3.238 3.238 3.296 3.36 3.467 3.589 3.708 3.827 3.946 4.067 4.19 4.315 4.443 4.573 4.708 4.845 4.985 5.128 5.274 5.421 5.571 5.721 5.872 6.023 6.174 6.325 6.474 6.622 6.769 6.915 7.058 7.201 7.341 7.48 7.617 7.753 7.887 8.02 8.152 8.282 8.411 8.54 8.667 8.793 8.919 9.043 9.167 9.29 9.411 9.532 9.651 9.768 9.882 9.992 10.097 10.193 10.277 10.343 10.386 10.4 10.4 10.397 10.389 10.375 10.356 10.332 10.304 10.271 10.233 10.192 10.147 10.097 10.045 9.989 9.929 9.867 9.802 9.734 9.664 9.591 9.516 9.439 9.36 9.279 9.197 9.113 9.027 8.941 8.853 8.764 8.675 8.584 8.493 8.401 8.309 8.216 8.123 8.029 7.936 7.842 7.748 7.654 7.561 7.467 7.373 7.28 7.187 7.095 7.003 6.911 6.82 6.729 6.639 6.549 6.46 6.371 6.284 6.197 6.11 6.024 5.94 5.855 5.772 5.689 5.607 5.526 5.446 5.367 5.288 5.211 5.134 5.058 4.983 4.909 4.835 4.763 4.691 4.621 4.551 4.482 4.414 4.346 4.28 4.214 4.15 4.086 4.023 3.961 3.899 3.839 3.779 3.721 3.663 3.605 3.549 3.493 3.439 3.385 3.331 3.279 3.227 3.176 3.126 3.077 3.028 2.98 2.933 2.886 2.84 2.795 2.75 2.706 2.663 2.621 2.579 2.537 2.497 2.457 2.417 2.379 2.34 2.303 2.266 2.229 2.193

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.36" PeakHeight="96.261" Num="3" Error="1.891">
-9.303 4.004 -0.962
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.36" EndFrequency="10.4" PeakHeight="379.815" Num="5" zHalfNm="245.461" Error="7.867">
-237.319 -59.583 25.594 -11.087 3.379
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.538" Depth="0.122"/>
<TopsideChapman PeakHeight="379.815" PeakDensity="1341935.5" PeakScaleHeight="94.629" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
