<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-26 -085 14:30:00.000"
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 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" >
2026.03.26 (085) 14:30:00</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">
FF202608503261430009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.435" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.598" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.450" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.560" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="103.449" Name="h`E" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" 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="3.393" 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="4.362" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="371.052" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="240.121" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.944" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="166.335" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.929" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="93.325" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="209.950" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.400" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="105">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 245.000 251.000 257.000 263.000 269.000 275.000 280.000 285.000 290.000 295.000 300.000 303.000 306.000 309.000 312.000 315.000 315.000 315.000 317.500 320.000 320.000 320.000 320.000 325.000 330.000 332.000 334.000 336.000 338.000 340.000 340.000 342.500 345.000 347.500 350.000 355.000 357.500 360.000 360.000 362.500 365.000 370.000 370.000 375.000 375.000 380.000 385.000 386.250 387.500 388.750 390.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 460.000 465.000 465.000 475.000 475.000 480.000 480.000 485.000 490.000 495.000 495.000 500.000 505.000 510.000 510.000 520.000 525.000 525.000 530.000 535.000 545.000 550.000 557.118 564.939 573.573 583.153 593.843 605.850 619.432 634.920 652.747 673.485
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 0 0 0 45 48 0 0 51 51 0 0 0 0 0 0 57 0 57 57 57 48 54 0 0 0 0 0 45 48 0 51 0 57 51 0 51 57 0 57 54 57 54 60 54 45 0 0 0 60 57 60 57 63 63 54 63 60 63 57 63 63 60 54 63 63 57 60 63 57 57 60 60 60 57 60 60 60 60 63 63 60 57 60 60 57 54 54 57 54 54 57 54 54 51 54 51 48 48 45 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 -1.953125 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -2.734375 2.734375 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 -2.734375 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.45 3.5 3.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
103.449 105.721 109.470
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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" >
89.459 90.0 95.0 100.0 105.0 110.0 111.538 113.076 114.614 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 371.052 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.242 2.395 3.08 3.444 3.56 3.431 3.431 3.56 3.571 3.704 3.835 3.965 4.095 4.227 4.36 4.494 4.632 4.771 4.913 5.057 5.203 5.351 5.5 5.65 5.801 5.952 6.103 6.253 6.403 6.553 6.701 6.848 6.994 7.138 7.281 7.423 7.564 7.703 7.84 7.977 8.112 8.245 8.378 8.509 8.639 8.767 8.894 9.02 9.144 9.265 9.384 9.5 9.611 9.717 9.816 9.905 9.982 10.042 10.082 10.099 10.1 10.098 10.091 10.079 10.061 10.039 10.011 9.98 9.943 9.903 9.859 9.811 9.759 9.704 9.646 9.585 9.521 9.454 9.385 9.313 9.239 9.163 9.085 9.006 8.925 8.842 8.758 8.672 8.586 8.498 8.41 8.32 8.23 8.14 8.049 7.957 7.866 7.773 7.681 7.589 7.496 7.404 7.312 7.22 7.128 7.036 6.945 6.854 6.763 6.673 6.583 6.494 6.406 6.318 6.23 6.143 6.057 5.972 5.887 5.803 5.72 5.638 5.556 5.475 5.395 5.316 5.237 5.16 5.083 5.007 4.932 4.858 4.785 4.712 4.641 4.57 4.5 4.431 4.363 4.296 4.23 4.164 4.099 4.036 3.973 3.911 3.849 3.789 3.729 3.671 3.613 3.556 3.499 3.444 3.389 3.335 3.282 3.23 3.178 3.128 3.077 3.028 2.98 2.932 2.885 2.838 2.792 2.747 2.703 2.659 2.616 2.574 2.532 2.491 2.451 2.411 2.372 2.333 2.295 2.258 2.221 2.185 2.149 2.114 2.079 2.045 2.012

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.56" PeakHeight="110.0" Num="3" Error="0.0">
-30.615 13.324 -3.25
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.56" EndFrequency="10.1" PeakHeight="371.052" Num="5" zHalfNm="240.121" Error="4.782">
-222.498 -48.022 19.297 -7.2 1.985
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.614" Depth="0.129"/>
<TopsideChapman PeakHeight="371.052" PeakDensity="1265632.8" PeakScaleHeight="93.325" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
