<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 21:30:00.000"
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="2 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, 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" >
2026.03.29 (088) 21:30:00</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">
FF202608803292130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="12.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.585" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.575" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.200" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="12.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="522.261" 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="0.593" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="396.495" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="333.710" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.173" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="1.950" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="93.064" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.129" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="45.885" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="96.700" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.720" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="3.000" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="193">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.0 3.05 3.1 3.15 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 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 12.4 12.45 12.5 12.55 12.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 305.000 305.000 305.000 305.000 305.000 305.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 311.667 313.333 315.000 316.667 318.333 320.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 325.000 320.000 320.000 321.667 323.333 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 335.000 336.000 337.000 338.000 339.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 342.500 345.000 345.000 345.000 345.000 345.000 345.000 346.667 348.333 350.000 351.667 353.333 355.000 350.000 352.500 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 370.000 370.000 372.500 375.000 376.667 378.333 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 392.500 390.000 395.000 400.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 411.667 413.333 415.000 416.000 417.000 418.000 419.000 420.000 425.000 425.000 427.500 430.000 432.500 435.000 440.000 440.000 442.188 444.375 446.563 448.750 450.938 453.125 455.313 457.500 459.688 461.875 464.063 466.250 468.438 470.625 472.813 475.000 477.500 480.000 480.000 482.500 485.000 485.000 485.000 487.273 489.545 491.818 494.091 496.364 498.636 500.909 503.182 505.455 507.727 510.000 515.000 515.000 515.000 515.000 517.500 519.713 522.261 525.224 528.715 532.886 537.961
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 60 60 63 63 0 69 69 0 0 0 0 0 60 72 72 72 72 72 72 72 75 75 84 84 84 0 0 0 0 0 0 72 0 0 0 63 69 69 69 57 0 60 66 66 0 0 72 72 72 69 69 66 0 0 72 66 0 0 0 0 63 69 0 66 0 0 72 0 63 0 69 69 51 66 0 60 0 72 57 60 78 66 72 75 81 69 72 66 0 72 57 63 60 66 72 54 60 69 48 69 66 63 69 45 0 60 66 0 75 63 57 75 78 54 66 72 60 0 78 78 63 63 69 75 81 84 78 75 60 66 72 0 0 63 0 57 0 0 63 63 60 0 54 0 57 48 51 0 0 0 0 0 0 51 0 48 51 0 0 0 0 0 48 0 48 54 0 48 48 42 0 0 0 0 0 0 0 0 0 0 45 42 45 54 51 0 57 0 57 0 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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -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 -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 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -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 -1.953125 -1.171875 -1.171875 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 1.171875 -1.171875 1.953125 -1.953125 2.734375 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 1.953125 -1.953125 -1.171875 -1.953125 -1.953125 0.390625 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 0.390625 -1.953125 2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="26">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
120.000 115.000 125.000 115.000 115.000 115.000 115.000 115.000 115.000 110.000 112.500 115.000 117.500 120.000 115.000 116.111 117.222 118.333 119.444 120.556 121.667 122.778 123.889 125.000 120.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 69 57 78 0 0 0 0 69 57 0 75 0 63 72 0 0 0 0 0 0 0 0 54 57 57
</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 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.133 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.638 140.0 145.0 150.0 155.0 160.0 163.277 165.0 170.0 175.0 180.0 185.0 189.915 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 396.495 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.393 0.514 0.574 0.593 0.585 0.559 0.514 0.444 0.329 0.273 0.273 0.273 0.273 0.273 0.273 0.273 0.294 0.354 0.414 0.474 0.534 0.593 0.6 0.764 0.881 0.995 1.114 1.244 1.388 1.55 1.734 1.945 2.185 2.456 2.758 3.086 3.433 3.794 4.163 4.537 4.911 5.286 5.66 6.033 6.406 6.777 7.148 7.519 7.891 8.262 8.634 9.006 9.377 9.749 10.119 10.486 10.847 11.199 11.536 11.851 12.13 12.359 12.52 12.596 12.6 12.593 12.559 12.5 12.417 12.312 12.188 12.046 11.888 11.716 11.532 11.337 11.133 10.921 10.703 10.479 10.251 10.021 9.788 9.554 9.32 9.086 8.852 8.62 8.39 8.163 7.938 7.716 7.498 7.283 7.072 6.865 6.662 6.464 6.27 6.08 5.895 5.714 5.537 5.366 5.198 5.035 4.877 4.722 4.573 4.427 4.285 4.148 4.015 3.885 3.76 3.638 3.52 3.405 3.294 3.187 3.082 2.981 2.884 2.789 2.697 2.608 2.522 2.439 2.358 2.28 2.205 2.132 2.061 1.993 1.927 1.863 1.801 1.741 1.683 1.627 1.573 1.521 1.47 1.421 1.374 1.328 1.284 1.241 1.199 1.159 1.121 1.083 1.047 1.012 0.978 0.946 0.914 0.883 0.854 0.825 0.798 0.771 0.745 0.72 0.696 0.673 0.651 0.629 0.608 0.587 0.568 0.549 0.53 0.513 0.496 0.479 0.463 0.447 0.432 0.418 0.404 0.39 0.377 0.365 0.353 0.341

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.593" PeakHeight="110.0" Num="3" Error="0.0">
-23.59 5.293 -0.57
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.593" EndFrequency="12.6" PeakHeight="396.495" Num="5" zHalfNm="333.71" Error="6.256">
-196.559 -22.082 16.9 -10.571 5.732
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="79.915" Depth="0.32"/>
<TopsideChapman PeakHeight="396.495" PeakDensity="1969727.0" PeakScaleHeight="45.885" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
