<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 16:30:00.000"
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) 16:30:00</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">
FF202608103221630009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.333" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.334" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.750" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.360" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="101.990" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="100.511" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.249" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="545.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.327" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.331" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="385.605" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="247.644" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.903" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="174.524" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.018" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="96.878" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="223.020" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.330" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="103">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 280.000 282.500 285.000 290.000 295.000 300.000 305.000 305.000 308.333 311.667 315.000 320.000 320.000 320.000 325.000 325.000 327.500 330.000 335.000 336.667 338.333 340.000 341.667 343.333 345.000 347.143 349.286 351.429 353.571 355.714 357.857 360.000 365.000 367.000 369.000 371.000 373.000 375.000 380.000 380.000 385.000 385.000 390.000 395.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 445.000 455.000 455.000 460.000 465.000 465.000 475.000 480.000 485.000 485.000 490.000 495.000 500.000 505.000 505.000 515.000 520.000 525.000 525.000 530.000 535.000 540.000 545.000 545.000 550.000 555.000 565.000 570.000 575.000 580.000 590.000 595.000 601.278 608.179 615.802 624.265 633.715 644.336 656.360 670.084 685.897
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 48 0 51 45 45 48 0 0 45 45 57 54 54 60 0 54 54 0 51 0 45 0 54 0 0 0 48 0 0 51 51 0 45 0 0 57 51 51 51 57 54 48 51 57 60 54 60 54 57 0 51 48 60 54 63 66 66 72 72 69 66 66 69 69 69 69 69 66 63 63 63 63 66 69 69 69 66 63 63 63 63 60 63 63 66 66 63 63 57 57 54 51 54 57 60 54 51 51 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 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 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 0.390625 0.390625 0.390625 -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 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 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="13">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
101.990 102.636 103.325 104.060 104.849 105.701 106.626 107.638 108.756 110.007 111.429 113.081 115.061
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 0 48 0 0 0 0 0 0 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -1.171875 -2.734375 0.390625 1.953125 -0.390625 0.390625 0.390625 -1.953125 -0.390625 1.171875 -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 95.0 100.0 100.511 102.322 104.134 105.0 105.945 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 385.605 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.833 3.356 3.36 3.236 3.236 3.295 3.36 3.464 3.585 3.702 3.818 3.932 4.048 4.165 4.284 4.405 4.529 4.656 4.785 4.917 5.052 5.189 5.329 5.469 5.611 5.753 5.896 6.038 6.179 6.32 6.459 6.597 6.733 6.868 7.001 7.133 7.263 7.391 7.518 7.643 7.767 7.889 8.01 8.13 8.249 8.368 8.485 8.601 8.716 8.831 8.945 9.057 9.169 9.28 9.389 9.496 9.599 9.698 9.789 9.871 9.937 9.982 10.0 10.0 9.998 9.991 9.979 9.963 9.941 9.916 9.886 9.852 9.815 9.774 9.729 9.681 9.63 9.575 9.518 9.458 9.396 9.331 9.264 9.195 9.124 9.051 8.976 8.9 8.822 8.743 8.662 8.581 8.498 8.415 8.33 8.245 8.159 8.073 7.986 7.899 7.812 7.724 7.636 7.548 7.46 7.372 7.284 7.196 7.108 7.02 6.933 6.846 6.759 6.673 6.587 6.502 6.417 6.332 6.248 6.165 6.082 6.0 5.919 5.838 5.758 5.678 5.599 5.521 5.444 5.367 5.292 5.216 5.142 5.069 4.996 4.924 4.853 4.782 4.713 4.644 4.576 4.508 4.442 4.376 4.312 4.248 4.184 4.122 4.06 3.999 3.939 3.88 3.822 3.764 3.707 3.651 3.595 3.54 3.486 3.433 3.381 3.329 3.278 3.228 3.178 3.129 3.081 3.033 2.986 2.94 2.895 2.85 2.806 2.762 2.719 2.677 2.635 2.594 2.553 2.514 2.474 2.436 2.398 2.36 2.323 2.287 2.251

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.36" PeakHeight="100.511" Num="3" Error="2.396">
-15.619 6.723 -1.615
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.36" EndFrequency="10.0" PeakHeight="385.605" Num="5" zHalfNm="247.644" Error="5.675">
-237.555 -60.856 26.447 -11.37 3.674
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.434" Depth="0.124"/>
<TopsideChapman PeakHeight="385.605" PeakDensity="1240694.8" PeakScaleHeight="96.878" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
