<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-19 -078 23:30:00.000"
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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.03.19 (078) 23:30:00</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">
FF202607803192330009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.608" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.476" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="415.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="415.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="511.523" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="440.740" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="396.950" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.762" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="66.756" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.547" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="33.673" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="81.470" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.050" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="106">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
420.000 420.000 420.000 420.000 419.167 418.333 417.500 416.667 415.833 415.000 420.000 420.000 420.000 425.000 435.000 440.000 445.000 450.000 450.000 450.000 445.000 440.000 440.000 442.500 445.000 444.722 444.444 444.167 443.889 443.611 443.333 443.056 442.778 442.500 442.222 441.944 441.667 441.389 441.111 440.833 440.556 440.278 440.000 430.000 425.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 422.069 424.138 426.207 428.276 430.345 432.414 434.483 436.552 438.621 440.690 442.759 444.828 446.897 448.966 451.034 453.103 455.172 457.241 459.310 461.379 463.448 465.517 467.586 469.655 471.724 473.793 475.862 477.931 480.000 480.000 480.000 481.667 483.333 485.000 485.000 485.429 485.907 486.444 487.049 487.738 488.529 489.447 490.525 491.809 493.363 495.283 497.716 500.899 505.243 511.523 521.405 539.234 581.046
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 57 63 0 0 0 0 0 54 57 0 57 54 51 0 0 60 60 54 0 57 57 0 57 0 0 0 0 0 0 60 0 0 0 51 0 0 51 0 51 0 48 51 0 57 0 0 0 48 0 48 51 0 0 0 0 0 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 0 0 0 0 0 0 48 51 0 51 0 51 48 0 51 0 0 48 0 0 0 0 0 0 51 0 0 0 48 45 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.953125 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -0.390625 1.171875 1.171875 -1.171875 -1.171875 -1.953125 -0.390625 -1.171875 1.171875 -1.171875 2.734375 0.390625 0.390625 -1.171875 1.171875 -1.953125 1.171875 -2.734375 -2.734375 1.171875 1.953125 0.390625 -1.953125 1.171875 1.953125 -0.390625 -1.171875 -1.171875 -0.390625 1.171875 1.171875 -0.390625 -2.734375 -0.390625 -1.953125 1.171875 -1.953125 -0.390625 -0.390625 -2.734375 -1.953125 -2.734375 -0.390625 -2.734375 1.171875 1.953125 -2.734375 -1.953125 -1.953125 1.171875 -2.734375 -1.171875 -1.953125 -0.390625 -1.171875 -2.734375 -0.390625 1.171875 -1.171875 -1.953125 -1.171875 -2.734375 -2.734375 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -1.953125 -0.390625 -1.171875 -1.171875 -2.734375 -0.390625 -0.390625 2.734375 -1.953125 -2.734375 -1.953125 2.734375 -1.171875 1.953125 1.953125 -2.734375 -1.953125 -1.953125 -1.953125 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="165">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.04 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.081 185.0 190.0 195.0 200.0 205.0 210.0 215.0 215.121 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 440.74 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.312 0.286 0.25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.244 0.266 0.288 0.31 0.331 0.353 0.354 0.4 0.462 0.539 0.625 0.715 0.806 0.898 0.99 1.083 1.177 1.272 1.369 1.469 1.57 1.675 1.783 1.895 2.01 2.13 2.255 2.385 2.52 2.662 2.811 2.967 3.131 3.304 3.487 3.681 3.886 4.105 4.337 4.585 4.849 5.13 5.429 5.746 6.076 6.417 6.758 7.086 7.382 7.621 7.783 7.849 7.85 7.838 7.795 7.725 7.63 7.513 7.378 7.227 7.063 6.889 6.706 6.516 6.322 6.125 5.927 5.728 5.53 5.333 5.139 4.947 4.759 4.576 4.396 4.221 4.051 3.887 3.727 3.572 3.423 3.278 3.139 3.005 2.876 2.752 2.633 2.518 2.408 2.303 2.202 2.105 2.012 1.922 1.837 1.755 1.677 1.602 1.531 1.462 1.397 1.334 1.274 1.217 1.162 1.11 1.06 1.012 0.967 0.923 0.881 0.842 0.804 0.767 0.733 0.699 0.668 0.638 0.609 0.581 0.555 0.53 0.506 0.483 0.461 0.44 0.42 0.401 0.383 0.366 0.349 0.333 0.318 0.304 0.29 0.277 0.264 0.252 0.241 0.23 0.22 0.21 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="7.85" PeakHeight="440.74" Num="5" zHalfNm="396.95" Error="6.31">
-186.7 -60.325 23.366 1.697 -3.657
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="105.121" Depth="0.154"/>
<TopsideChapman PeakHeight="440.74" PeakDensity="764547.1" PeakScaleHeight="33.673" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
