<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-21 -080 18:50:00.000"
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: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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" >
2026.03.21 (080) 18:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202608003211850009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.588" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.966" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" Name="h`F2" 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="11.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.000" 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="2.804" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="375.749" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="286.558" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.583" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="121.232" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.085" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="65.816" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="151.960" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="167">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 255.000 260.000 260.000 260.000 262.500 265.000 265.000 266.429 267.857 269.286 270.714 272.143 273.571 275.000 275.000 280.000 285.000 285.000 285.000 287.500 290.000 292.000 294.000 296.000 298.000 300.000 300.000 300.000 300.000 300.000 300.000 302.059 304.118 306.176 308.235 310.294 312.353 314.412 316.471 318.529 320.588 322.647 324.706 326.765 328.824 330.882 332.941 335.000 335.000 337.500 340.000 340.000 340.000 340.000 345.000 345.000 345.000 347.500 350.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 425.000 425.000 430.000 431.000 432.000 433.000 434.000 435.000 435.000 435.000 438.333 441.667 445.000 445.000 445.000 445.000 445.000 450.000 450.000 455.000 455.000 455.000 455.000 457.500 460.000 465.000 470.000 470.000 475.000 475.000 480.000 485.000 485.000 480.000 482.500 485.000 485.000 490.000 495.000 499.947 505.287 511.069 517.348 524.193 531.684 539.916 549.006 559.094 570.355 583.006 597.321
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 60 51 57 60 0 63 0 0 0 57 0 0 0 54 45 0 0 0 57 0 0 0 0 0 0 0 0 0 0 0 54 0 0 0 0 63 0 0 0 0 0 0 0 0 0 0 0 0 57 45 51 60 63 69 57 66 66 0 63 51 0 66 57 63 69 60 66 69 60 66 69 63 66 57 60 63 57 63 66 63 66 66 63 66 69 66 69 69 69 66 69 69 69 69 66 69 66 66 63 60 66 66 66 63 60 66 63 63 66 60 63 0 66 0 60 63 63 0 0 0 0 60 60 57 0 0 51 0 57 0 0 57 57 54 57 54 51 0 51 0 51 54 48 51 51 42 51 51 0 48 45 0 0 45 0 0 0 0 0 0 48 45 42 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 -0.390625 -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 -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 -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 -1.953125 -2.734375 2.734375 -0.390625 -0.390625 -0.390625 -1.171875 -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" >
89.58 90.0 95.0 100.0 105.0 110.0 114.112 115.0 118.223 120.0 122.335 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 375.749 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.884 2.427 2.713 2.804 2.682 2.682 2.682 2.735 2.804 2.871 2.999 3.129 3.262 3.399 3.538 3.681 3.827 3.977 4.131 4.288 4.449 4.614 4.783 4.956 5.132 5.312 5.496 5.684 5.875 6.069 6.268 6.469 6.674 6.882 7.094 7.308 7.526 7.747 7.971 8.198 8.427 8.66 8.895 9.132 9.372 9.614 9.857 10.102 10.347 10.591 10.834 11.073 11.307 11.531 11.742 11.934 12.099 12.228 12.314 12.349 12.35 12.345 12.327 12.296 12.253 12.199 12.134 12.06 11.976 11.883 11.782 11.674 11.559 11.438 11.311 11.179 11.043 10.902 10.758 10.611 10.46 10.308 10.153 9.996 9.839 9.68 9.52 9.36 9.2 9.04 8.88 8.721 8.562 8.404 8.247 8.091 7.936 7.783 7.631 7.48 7.332 7.185 7.04 6.896 6.755 6.616 6.478 6.343 6.21 6.079 5.949 5.823 5.698 5.575 5.455 5.336 5.22 5.106 4.994 4.884 4.776 4.67 4.567 4.465 4.365 4.268 4.172 4.078 3.987 3.897 3.809 3.722 3.638 3.555 3.474 3.395 3.318 3.242 3.168 3.095 3.024 2.955 2.887 2.821 2.756 2.692 2.63 2.569 2.51 2.452 2.395 2.34 2.286 2.233 2.181 2.13 2.081 2.033 1.985 1.939 1.894 1.85 1.807 1.765 1.724 1.684 1.645 1.606 1.569 1.532 1.496 1.461 1.427 1.394 1.361 1.33 1.299 1.268 1.239 1.21 1.181 1.154 1.127 1.1 1.075 1.05

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.804" PeakHeight="110.0" Num="3" Error="0.0">
-30.022 12.45 -2.848
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.804" EndFrequency="12.35" PeakHeight="375.749" Num="5" zHalfNm="286.558" Error="2.848">
-206.301 -58.912 14.213 -3.027 0.613
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.335" Depth="0.122"/>
<TopsideChapman PeakHeight="375.749" PeakDensity="1892338.8" PeakScaleHeight="65.816" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
