<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 17:10:00.000"
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" >
2026.03.22 (081) 17:10:00</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">
FF202608103221710009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.656" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.020" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.050" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" 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="3.232" 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="4.287" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="338.029" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="243.699" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.150" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.200" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="122.660" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.756" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.020" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="158.390" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="114">
<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 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 275.000 275.000 277.059 279.118 281.176 283.235 285.294 287.353 289.412 291.471 293.529 295.588 297.647 299.706 301.765 303.824 305.882 307.941 310.000 310.000 310.000 310.000 312.000 314.000 316.000 318.000 320.000 325.000 325.000 325.000 325.000 330.000 331.250 332.500 333.750 335.000 336.250 337.500 338.750 340.000 341.250 342.500 343.750 345.000 345.000 345.000 345.000 350.000 351.111 352.222 353.333 354.444 355.556 356.667 357.778 358.889 360.000 362.500 365.000 367.500 370.000 370.000 370.000 375.000 376.667 378.333 380.000 380.000 380.000 380.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 405.000 405.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 430.000 430.000 430.000 435.000 435.000 445.000 445.000 450.000 450.000 460.000 460.000 465.000 465.000 475.000 478.810 483.038 487.759 493.064 499.068 505.919 513.810 522.996 533.827 546.787 562.571
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 45 0 45 0 0 0 51 0 0 0 0 51 0 0 0 0 0 54 54 51 45 0 0 51 0 60 60 63 63 60 60 0 0 0 0 0 0 0 0 0 48 0 54 54 0 60 57 0 45 0 0 0 0 0 0 66 0 63 0 54 0 66 51 0 0 54 63 66 69 63 54 63 69 63 69 72 69 60 69 69 66 66 57 57 57 57 57 48 57 54 54 57 54 60 57 51 51 54 54 54 51 54 57 57 51 54 57 57 54 42 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.953125 -0.390625 -1.171875 -1.171875 0.390625 -2.734375 0.390625 2.734375 1.171875 -2.734375 -1.171875 -0.390625 -1.171875 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 -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 0.390625 0.390625 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 -0.390625 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="18">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 105.000 102.500 100.000 105.000 105.833 106.667 107.500 108.333 109.167 110.000 105.000 108.000 111.000 114.000 117.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 51 0 0 0 0 0 45 48 0 0 0 0 45 45
</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 -2.734375 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 2.734375 0.390625 1.171875 0.390625 -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" >
89.508 90.0 95.0 100.0 105.0 110.0 112.206 114.411 115.0 116.617 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 338.029 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.174 2.797 3.127 3.232 3.11 3.11 3.143 3.232 3.353 3.514 3.665 3.811 3.954 4.097 4.24 4.384 4.531 4.681 4.833 4.988 5.148 5.31 5.477 5.647 5.821 5.998 6.178 6.362 6.548 6.737 6.928 7.121 7.315 7.511 7.708 7.905 8.102 8.3 8.497 8.694 8.89 9.084 9.276 9.465 9.649 9.827 9.996 10.153 10.293 10.409 10.494 10.542 10.55 10.549 10.54 10.52 10.491 10.453 10.406 10.351 10.288 10.218 10.142 10.059 9.971 9.878 9.779 9.676 9.57 9.459 9.345 9.229 9.109 8.988 8.864 8.739 8.612 8.484 8.355 8.226 8.096 7.965 7.835 7.704 7.574 7.444 7.315 7.186 7.058 6.931 6.805 6.679 6.555 6.433 6.311 6.191 6.072 5.954 5.838 5.724 5.611 5.5 5.39 5.282 5.175 5.07 4.967 4.865 4.765 4.667 4.571 4.476 4.382 4.291 4.201 4.112 4.025 3.94 3.857 3.775 3.694 3.615 3.538 3.462 3.388 3.315 3.243 3.173 3.105 3.037 2.971 2.907 2.844 2.782 2.721 2.661 2.603 2.546 2.49 2.436 2.382 2.33 2.279 2.229 2.18 2.132 2.085 2.039 1.994 1.949 1.906 1.864 1.823 1.783 1.743 1.704 1.667 1.63 1.594 1.558 1.524 1.49 1.457 1.424 1.393 1.362 1.331 1.302 1.273 1.244 1.217 1.189 1.163 1.137 1.112 1.087 1.063 1.039 1.016 0.993 0.971 0.949 0.928 0.907 0.887 0.867

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.232" PeakHeight="110.0" Num="3" Error="0.0">
-30.382 12.977 -3.087
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.232" EndFrequency="10.55" PeakHeight="338.029" Num="5" zHalfNm="243.699" Error="4.406">
-184.004 -48.836 12.136 -2.395 1.687
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.617" Depth="0.122"/>
<TopsideChapman PeakHeight="338.029" PeakDensity="1380924.4" PeakScaleHeight="69.02" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
